/ Precision Measuring Tools / Gage Blocks / Individual Gage Blocks / SC .650 A1 * Not actual product image SC .650 A1 Square Gage Block #(--edpnumber)# Square Gage Blocks Square Croblox Gage Block - .650 In., Grade A1 Premium .650 In., A1 Grade Square Croblox Chromium Carbide Gage Block. Features accuracy and stability unique to Starrett-Webber Gage. Outlasting regular Steel and Cermic gage block, Croblox gage blocks will not corrode, and are very stable and accurate, with exceptional "wringing" capabilities. Features Specifications Product Testimonials Other similar products SC .050 A1 Square Gage Block SC .050 AA Square Gage Block SC .0625 A1 Square Gage Block SC .0625 AA Square Gage Block SC .078125 A1 Square Gage Block SC .078125 AA Square Gage Block SC .09375 A1 Square Gage Block SC .09375 AA Square Gage Block SC .100 A1 Square Gage Block SC .100 AA Square Gage Block SC .100 WA1 Square Gage Block SC .100025 A1 Square Gage Block SC .100025 AA Square Gage Block SC .10005 A1 Square Gage Block SC .10005 AA Square Gage Block SC .100075 A1 Square Gage Block SC .100075 AA Square Gage Block SC .1001 A1 Square Gage Block SC .1001 AA Square Gage Block SC .1002 A1 Square Gage Block SC .1002 AA Square Gage Block SC .1003 A1 Square Gage Block SC .1003 AA Square Gage Block SC .1004 A1 Square Gage Block SC .1004 AA Square Gage Block SC .1005 A1 Square Gage Block SC .1005 AA Square Gage Block SC .1006 A1 Square Gage Block SC .1006 AA Square Gage Block SC .1007 A1 Square Gage Block SC .1007 AA Square Gage Block SC .1008 A1 Square Gage Block SC .1008 AA Square Gage Block SC .1009 A1 Square Gage Block SC .1009 AA Square Gage Block SC .101 A1 Square Gage Block SC .101 AA Square Gage Block SC .102 A1 Square Gage Block SC .102 AA Square Gage Block SC .103 A1 Square Gage Block SC .103 AA Square Gage Block SC .104 A1 Square Gage Block SC .104 AA Square Gage Block SC .105 A1 Square Gage Block SC .105 AA Square Gage Block SC .106 A1 Square Gage Block SC .106 AA Square Gage Block SC .107 A1 Square Gage Block SC .107 AA Square Gage Block SC .108 A1 Square Gage Block SC .108 AA Square Gage Block SC .109 A1 Square Gage Block SC .109 AA Square Gage Block SC .109375 A1 Square Gage Block SC .109375 AA Square Gage Block SC .110 A1 Square Gage Block SC .110 AA Square Gage Block SC .111 A1 Square Gage Block SC .111 AA Square Gage Block SC .112 A1 Square Gage Block SC .112 AA Square Gage Block SC .113 A1 Square Gage Block SC .113 AA Square Gage Block SC .114 A1 Square Gage Block SC .114 AA Square Gage Block SC .115 A1 Square Gage Block SC .115 AA Square Gage Block SC .116 A1 Square Gage Block SC .116 AA Square Gage Block SC .117 A1 Square Gage Block SC .117 AA Square Gage Block SC .118 A1 Square Gage Block SC .118 AA Square Gage Block SC .119 A1 Square Gage Block SC .119 AA Square Gage Block SC .120 A1 Square Gage Block SC .120 AA Square Gage Block SC .121 A1 Square Gage Block SC .121 AA Square Gage Block SC .122 A1 Square Gage Block SC .122 AA Square Gage Block SC .123 A1 Square Gage Block SC .123 AA Square Gage Block SC .124 A1 Square Gage Block SC .124 AA Square Gage Block SC .125 A1 Square Gage Block SC .125 AA Square Gage Block SC .126 A1 Square Gage Block SC .126 AA Square Gage Block SC .127 A1 Square Gage Block SC .127 AA Square Gage Block SC .128 A1 Square Gage Block SC .128 AA Square Gage Block SC .129 A1 Square Gage Block SC .129 AA Square Gage Block SC .130 A1 Square Gage Block SC .130 AA Square Gage Block SC .131 A1 Square Gage Block SC .131 AA Square Gage Block SC .132 A1 Square Gage Block SC .132 AA Square Gage Block SC .133 A1 Square Gage Block SC .133 AA Square Gage Block SC .134 A1 Square Gage Block SC .134 AA Square Gage Block SC .135 A1 Square Gage Block SC .135 AA Square Gage Block SC .136 A1 Square Gage Block SC .136 AA Square Gage Block SC .137 A1 Square Gage Block SC .137 AA Square Gage Block SC .138 A1 Square Gage Block SC .138 AA Square Gage Block SC .139 A1 Square Gage Block SC .139 AA Square Gage Block SC .140 A1 Square Gage Block SC .140 AA Square Gage Block SC .141 A1 Square Gage Block SC .141 AA Square Gage Block SC .142 A1 Square Gage Block SC .142 AA Square Gage Block SC .143 A1 Square Gage Block SC .143 AA Square Gage Block SC .144 A1 Square Gage Block SC .144 AA Square Gage Block SC .145 A1 Square Gage Block SC .145 AA Square Gage Block SC .146 A1 Square Gage Block SC .146 AA Square Gage Block SC .147 A1 Square Gage Block SC .147 AA Square Gage Block SC .148 A1 Square Gage Block SC .148 AA Square Gage Block SC .149 A1 Square Gage Block SC .149 AA Square Gage Block SC .150 A1 Square Gage Block SC .150 AA Square Gage Block SC .160 A1 Square Gage Block SC .160 AA Square Gage Block SC .170 A1 Square Gage Block SC .170 AA Square Gage Block SC .180 A1 Square Gage Block SC .180 AA Square Gage Block SC .190 A1 Square Gage Block SC .190 AA Square Gage Block SC .200 A1 Square Gage Block SC .200 AA Square Gage Block SC .250 A1 Square Gage Block SC .250 AA Square Gage Block SC .300 A1 Square Gage Block SC .300 AA Square Gage Block SC .350 A1 Square Gage Block SC .350 AA Square Gage Block SC .400 A1 Square Gage Block SC .400 AA Square Gage Block SC .450 A1 Square Gage Block SC .450 AA Square Gage Block SC .500 A1 Square Gage Block SC .500 AA Square Gage Block SC .550 A1 Square Gage Block SC .550 AA Square Gage Block SC .600 A1 Square Gage Block SC .600 AA Square Gage Block SC .650 A1 Square Gage Block SC .650 AA Square Gage Block SC .700 A1 Square Gage Block SC .700 AA Square Gage Block SC .750 A1 Square Gage Block SC .750 AA Square Gage Block SC .800 A1 Square Gage Block SC .800 AA Square Gage Block SC .850 A1 Square Gage Block SC .850 AA Square Gage Block SC .900 A1 Square Gage Block SC .900 AA Square Gage Block SC .950 A1 Square Gage Block SC .950 AA Square Gage Block SC 1.000 A1 Square Gage Block SC 1.000 AA Square Gage Block SC 2.000 A1 Square Gage Block SC 2.000 AA Square Gage Block SC 3.000 A1 Square Gage Block SC 3.000 AA Square Gage Block SC 4.000 A1 Square Gage Block SC 4.000 AA Square Gage Block SCM .5 AA Square Gage Block SCM 1.0 AA Square Gage Block SCM 1.5 A1 Square Gage Block SCM 1.5 AA Square Gage Block SCM 10.0 A1 Square Gage Block SCM 10.0 AA Square Gage Block SCM 100.0 A1 Square Gage Block SCM 100.0 AA Square Gage Block SCM 15.0 A1 Square Gage Block SCM 15.0 AA Square Gage Block SCM 2.0 A1 Square Gage Block SCM 2.0 AA Square Gage Block SCM 2.0 WA1 Square Gage Block SCM 2.0005 A1 Square Gage Block SCM 2.0005 AA Square Gage Block SCM 2.001 A1 Square Gage Block SCM 2.001 AA Square Gage Block SCM 2.002 A1 Square Gage Block SCM 2.002 AA Square Gage Block SCM 2.003 A1 Square Gage Block SCM 2.003 AA Square Gage Block SCM 2.004 A1 Square Gage Block SCM 2.004 AA Square Gage Block SCM 2.005 A1 Square Gage Block SCM 2.005 AA Square Gage Block SCM 2.006 A1 Square Gage Block SCM 2.006 AA Square Gage Block SCM 2.007 A1 Square Gage Block SCM 2.007 AA Square Gage Block SCM 2.008 A1 Square Gage Block SCM 2.008 AA Square Gage Block SCM 2.009 A1 Square Gage Block SCM 2.009 AA Square Gage Block SCM 2.01 A1 Square Gage Block SCM 2.01 AA Square Gage Block SCM 2.02 A1 Square Gage Block SCM 2.02 AA Square Gage Block SCM 2.03 A1 Square Gage Block SCM 2.03 AA Square Gage Block SCM 2.04 A1 Square Gage Block SCM 2.04 AA Square Gage Block SCM 2.05 A1 Square Gage Block SCM 2.05 AA Square Gage Block SCM 2.06 A1 Square Gage Block SCM 2.06 AA Square Gage Block SCM 2.07 A1 Square Gage Block SCM 2.07 AA Square Gage Block SCM 2.08 A1 Square Gage Block SCM 2.08 AA Square Gage Block SCM 2.09 A1 Square Gage Block SCM 2.09 AA Square Gage Block SCM 2.10 A1 Square Gage Block SCM 2.10 AA Square Gage Block SCM 2.11 A1 Square Gage Block SCM 2.11 AA Square Gage Block SCM 2.12 A1 Square Gage Block SCM 2.12 AA Square Gage Block SCM 2.13 A1 Square Gage Block SCM 2.13 AA Square Gage Block SCM 2.14 A1 Square Gage Block SCM 2.14 AA Square Gage Block SCM 2.15 A1 Square Gage Block SCM 2.15 AA Square Gage Block SCM 2.16 A1 Square Gage Block SCM 2.16 AA Square Gage Block SCM 2.17 A1 Square Gage Block SCM 2.17 AA Square Gage Block SCM 2.18 A1 Square Gage Block SCM 2.18 AA Square Gage Block SCM 2.19 A1 Square Gage Block SCM 2.19 AA Square Gage Block SCM 2.20 A1 Square Gage Block SCM 2.20 AA Square Gage Block SCM 2.21 A1 Square Gage Block SCM 2.21 AA Square Gage Block SCM 2.22 A1 Square Gage Block SCM 2.22 AA Square Gage Block SCM 2.23 A1 Square Gage Block SCM 2.23 AA Square Gage Block SCM 2.24 A1 Square Gage Block SCM 2.24 AA Square Gage Block SCM 2.25 A1 Square Gage Block SCM 2.25 AA Square Gage Block SCM 2.26 A1 Square Gage Block SCM 2.26 AA Square Gage Block SCM 2.27 A1 Square Gage Block SCM 2.27 AA Square Gage Block SCM 2.28 A1 Square Gage Block SCM 2.28 AA Square Gage Block SCM 2.29 A1 Square Gage Block SCM 2.29 AA Square Gage Block SCM 2.30 A1 Square Gage Block SCM 2.30 AA Square Gage Block SCM 2.31 A1 Square Gage Block SCM 2.31 AA Square Gage Block SCM 2.32 A1 Square Gage Block SCM 2.32 AA Square Gage Block SCM 2.33 A1 Square Gage Block SCM 2.33 AA Square Gage Block SCM 2.34 A1 Square Gage Block SCM 2.34 AA Square Gage Block SCM 2.35 A1 Square Gage Block SCM 2.35 AA Square Gage Block SCM 2.36 A1 Square Gage Block SCM 2.36 AA Square Gage Block SCM 2.37 A1 Square Gage Block SCM 2.37 AA Square Gage Block SCM 2.38 A1 Square Gage Block SCM 2.38 AA Square Gage Block SCM 2.39 A1 Square Gage Block SCM 2.39 AA Square Gage Block SCM 2.40 A1 Square Gage Block SCM 2.40 AA Square Gage Block SCM 2.41 A1 Square Gage Block SCM 2.41 AA Square Gage Block SCM 2.42 A1 Square Gage Block SCM 2.42 AA Square Gage Block SCM 2.43 A1 Square Gage Block SCM 2.43 AA Square Gage Block SCM 2.44 A1 Square Gage Block SCM 2.44 AA Square Gage Block SCM 2.45 A1 Square Gage Block SCM 2.45 AA Square Gage Block SCM 2.46 A1 Square Gage Block SCM 2.46 AA Square Gage Block SCM 2.47 A1 Square Gage Block SCM 2.47 AA Square Gage Block SCM 2.48 A1 Square Gage Block SCM 2.48 AA Square Gage Block SCM 2.49 A1 Square Gage Block SCM 2.49 AA Square Gage Block SCM 2.5 A1 Square Gage Block SCM 2.5 AA Square Gage Block SCM 2.6 A1 Square Gage Block SCM 2.6 AA Square Gage Block SCM 2.7 A1 Square Gage Block SCM 2.7 AA Square Gage Block SCM 2.8 A1 Square Gage Block SCM 2.8 AA Square Gage Block SCM 2.9 A1 Square Gage Block SCM 2.9 AA Square Gage Block SCM 20.0 A1 Square Gage Block SCM 20.0 AA Square Gage Block SCM 25.0 A1 Square Gage Block SCM 25.0 AA Square Gage Block SCM 3.0 A1 Square Gage Block SCM 3.0 AA Square Gage Block SCM 3.5 A1 Square Gage Block SCM 3.5 AA Square Gage Block SCM 30.0 A1 Square Gage Block SCM 30.0 AA Square Gage Block SCM 4.0 A1 Square Gage Block SCM 4.0 AA Square Gage Block SCM 4.5 A1 Square Gage Block SCM 4.5 AA Square Gage Block SCM 5.0 A1 Square Gage Block SCM 5.0 AA Square Gage Block SCM 5.5 A1 Square Gage Block SCM 5.5 AA Square Gage Block SCM 50.0 A1 Square Gage Block SCM 50.0 AA Square Gage Block SCM 6.0 A1 Square Gage Block SCM 6.0 AA Square Gage Block SCM 6.5 A1 Square Gage Block SCM 6.5 AA Square Gage Block SCM 7.0 A1 Square Gage Block SCM 7.0 AA Square Gage Block SCM 7.5 A1 Square Gage Block SCM 7.5 AA Square Gage Block SCM 75.0 A1 Square Gage Block SCM 75.0 AA Square Gage Block SCM 8.0 A1 Square Gage Block SCM 8.0 AA Square Gage Block SCM 8.5 A1 Square Gage Block SCM 8.5 AA Square Gage Block SCM 9.0 A1 Square Gage Block SCM 9.0 AA Square Gage Block SCM 9.5 A1 Square Gage Block SCM 9.5 AA Square Gage Block SS .010 A1 Square Gage Block SS .020 A1 Square Gage Block SS .02005 A1 Square Gage Block SS .0201 A1 Square Gage Block SS .0202 A1 Square Gage Block SS .0203 A1 Square Gage Block SS .0204 A1 Square Gage Block SS .0205 A1 Square Gage Block SS .0206 A1 Square Gage Block SS .0207 A1 Square Gage Block SS .0208 A1 Square Gage Block SS .0209 A1 Square Gage Block SS .021 A1 Square Gage Block SS .022 A1 Square Gage Block SS .023 A1 Square Gage Block SS .024 A1 Square Gage Block SS .025 A1 Square Gage Block SS .026 A1 Square Gage Block SS .027 A1 Square Gage Block SS .028 A1 Square Gage Block SS .029 A1 Square Gage Block SS .030 A1 Square Gage Block SS .040 A1 Square Gage Block SS .050 A1 Square Gage Block SS .060 A1 Square Gage Block SS .0625 A1 Square Gage Block SS .070 A1 Square Gage Block SS .078125 A1 Square Gage Block SS .080 A1 Square Gage Block SS .090 A1 Square Gage Block SS .09375 A1 Square Gage Block SS .100 A1 Square Gage Block SS .100025 A1 Square Gage Block SS .10005 A1 Square Gage Block SS .100075 A1 Square Gage Block SS .1001 A1 Square Gage Block SS .1002 A1 Square Gage Block SS .1003 A1 Square Gage Block SS .1004 A1 Square Gage Block SS .1005 A1 Square Gage Block SS .1006 A1 Square Gage Block SS .1007 A1 Square Gage Block SS .1008 A1 Square Gage Block SS .1009 A1 Square Gage Block SS .101 A1 Square Gage Block SS .102 A1 Square Gage Block SS .103 A1 Square Gage Block SS .104 A1 Square Gage Block SS .105 A1 Square Gage Block SS .106 A1 Square Gage Block SS .107 A1 Square Gage Block SS .108 A1 Square Gage Block SS .109 A1 Square Gage Block SS .109375 A1 Square Gage Block SS .110 A1 Square Gage Block SS .111 A1 Square Gage Block SS .112 A1 Square Gage Block SS .113 A1 Square Gage Block SS .114 A1 Square Gage Block SS .115 A1 Square Gage Block SS .116 A1 Square Gage Block SS .117 A1 Square Gage Block SS .118 A1 Square Gage Block SS .119 A1 Square Gage Block SS .120 A1 Square Gage Block SS .121 A1 Square Gage Block SS .122 A1 Square Gage Block SS .123 A1 Square Gage Block SS .124 A1 Square Gage Block SS .125 A1 Square Gage Block SS .126 A1 Square Gage Block SS .127 A1 Square Gage Block SS .128 A1 Square Gage Block SS .129 A1 Square Gage Block SS .130 A1 Square Gage Block SS .131 A1 Square Gage Block SS .132 A1 Square Gage Block SS .133 A1 Square Gage Block SS .134 A1 Square Gage Block SS .135 A1 Square Gage Block SS .136 A1 Square Gage Block SS .137 A1 Square Gage Block SS .138 A1 Square Gage Block SS .139 A1 Square Gage Block SS .140 A1 Square Gage Block SS .141 A1 Square Gage Block SS .142 A1 Square Gage Block SS .143 A1 Square Gage Block SS .144 A1 Square Gage Block SS .145 A1 Square Gage Block SS .146 A1 Square Gage Block SS .147 A1 Square Gage Block SS .148 A1 Square Gage Block SS .149 A1 Square Gage Block SS .150 A1 Square Gage Block SS .160 A1 Square Gage Block SS .170 A1 Square Gage Block SS .180 A1 Square Gage Block SS .190 A1 Square Gage Block SS .200 A1 Square Gage Block SS .250 A1 Square Gage Block SS .300 A1 Square Gage Block SS .350 A1 Square Gage Block SS .400 A1 Square Gage Block SS .450 A1 Square Gage Block SS .500 A1 Square Gage Block SS .550 A1 Square Gage Block SS .600 A1 Square Gage Block SS .650 A1 Square Gage Block SS .700 A1 Square Gage Block SS .750 A1 Square Gage Block SS .800 A1 Square Gage Block SS .850 A1 Square Gage Block SS .900 A1 Square Gage Block SS .950 A1 Square Gage Block SS 1.000 A1 Square Gage Block SS 10.000 A1 Square Gage Block SS 10.000 AA Square Gage Block SS 12.000 A1 Square Gage Block SS 12.000 AA Square Gage Block SS 16.000 A1 Square Gage Block SS 16.000 AA Square Gage Block SS 2.000 A1 Square Gage Block SS 20.000 A1 Square Gage Block SS 20.000 AA Square Gage Block SS 3.000 A1 Square Gage Block SS 4.000 A1 Square Gage Block SS 5.000 A1 Square Gage Block SS 5.000 AA Square Gage Block SS 6.000 A1 Square Gage Block SS 6.000 AA Square Gage Block SS 7.000 A1 Square Gage Block SS 7.000 AA Square Gage Block SS 8.000 A1 Square Gage Block SS 8.000 AA Square Gage Block SSM .5 A1 Square Gage Block SSM 1.0 A1 Square Gage Block SSM 1.5 A1 Square Gage Block SSM 10.0 A1 Square Gage Block SSM 10.5 A1 Square Gage Block SSM 100.0 A1 Square Gage Block SSM 11.0 A1 Square Gage Block SSM 11.5 A1 Square Gage Block SSM 12.0 A1 Square Gage Block SSM 12.5 A1 Square Gage Block SSM 125.0 A1 Square Gage Block SSM 125.0 AA Square Gage Block SSM 13.0 A1 Square Gage Block SSM 13.5 A1 Square Gage Block SSM 14.0 A1 Square Gage Block SSM 14.5 A1 Square Gage Block SSM 15.0 A1 Square Gage Block SSM 15.5 A1 Square Gage Block SSM 150.0 A1 Square Gage Block SSM 150.0 AA Square Gage Block SSM 16.0 A1 Square Gage Block SSM 16.5 A1 Square Gage Block SSM 17.0 A1 Square Gage Block SSM 17.5 A1 Square Gage Block SSM 175.0 A1 Square Gage Block SSM 175.0 AA Square Gage Block SSM 18.0 A1 Square Gage Block SSM 18.5 A1 Square Gage Block SSM 19.0 A1 Square Gage Block SSM 19.5 A1 Square Gage Block SSM 2.0 A1 Square Gage Block SSM 2.0005 A1 Square Gage Block SSM 2.001 A1 Square Gage Block SSM 2.002 A1 Square Gage Block SSM 2.003 A1 Square Gage Block SSM 2.004 A1 Square Gage Block SSM 2.005 A1 Square Gage Block SSM 2.006 A1 Square Gage Block SSM 2.007 A1 Square Gage Block SSM 2.008 A1 Square Gage Block SSM 2.009 A1 Square Gage Block SSM 2.01 A1 Square Gage Block SSM 2.02 A1 Square Gage Block SSM 2.03 A1 Square Gage Block SSM 2.04 A1 Square Gage Block SSM 2.05 A1 Square Gage Block SSM 2.06 A1 Square Gage Block SSM 2.07 A1 Square Gage Block SSM 2.08 A1 Square Gage Block SSM 2.09 A1 Square Gage Block SSM 2.10 A1 Square Gage Block SSM 2.11 A1 Square Gage Block SSM 2.12 A1 Square Gage Block SSM 2.13 A1 Square Gage Block SSM 2.14 A1 Square Gage Block SSM 2.15 A1 Square Gage Block SSM 2.16 A1 Square Gage Block SSM 2.17 A1 Square Gage Block SSM 2.18 A1 Square Gage Block SSM 2.19 A1 Square Gage Block SSM 2.20 A1 Square Gage Block SSM 2.21 A1 Square Gage Block SSM 2.22 A1 Square Gage Block SSM 2.23 A1 Square Gage Block SSM 2.24 A1 Square Gage Block SSM 2.25 A1 Square Gage Block SSM 2.26 A1 Square Gage Block SSM 2.27 A1 Square Gage Block SSM 2.28 A1 Square Gage Block SSM 2.29 A1 Square Gage Block SSM 2.30 A1 Square Gage Block SSM 2.31 A1 Square Gage Block SSM 2.32 A1 Square Gage Block SSM 2.33 A1 Square Gage Block SSM 2.34 A1 Square Gage Block SSM 2.35 A1 Square Gage Block SSM 2.36 A1 Square Gage Block SSM 2.37 A1 Square Gage Block SSM 2.38 A1 Square Gage Block SSM 2.39 A1 Square Gage Block SSM 2.40 A1 Square Gage Block SSM 2.41 A1 Square Gage Block SSM 2.42 A1 Square Gage Block SSM 2.43 A1 Square Gage Block SSM 2.44 A1 Square Gage Block SSM 2.45 A1 Square Gage Block SSM 2.46 A1 Square Gage Block SSM 2.47 A1 Square Gage Block SSM 2.48 A1 Square Gage Block SSM 2.49 A1 Square Gage Block SSM 2.5 A1 Square Gage Block SSM 2.6 A1 Square Gage Block SSM 2.7 A1 Square Gage Block SSM 2.8 A1 Square Gage Block SSM 2.9 A1 Square Gage Block SSM 20.0 A1 Square Gage Block SSM 20.5 A1 Square Gage Block SSM 200.0 A1 Square Gage Block SSM 200.0 AA Square Gage Block SSM 21.0 A1 Square Gage Block SSM 21.5 A1 Square Gage Block SSM 22.0 A1 Square Gage Block SSM 22.5 A1 Square Gage Block SSM 23.0 A1 Square Gage Block SSM 23.5 A1 Square Gage Block SSM 24.0 A1 Square Gage Block SSM 24.5 A1 Square Gage Block SSM 25.0 A1 Square Gage Block SSM 250.0 A1 Square Gage Block SSM 250.0 AA Square Gage Block SSM 3.0 A1 Square Gage Block SSM 3.5 A1 Square Gage Block SSM 30.0 A1 Square Gage Block SSM 300.0 A1 Square Gage Block SSM 300.0 AA Square Gage Block SSM 4.0 A1 Square Gage Block SSM 4.5 A1 Square Gage Block SSM 40.0 A1 Square Gage Block SSM 400.0 A1 Square Gage Block SSM 400.0 AA Square Gage Block SSM 5.0 A1 Square Gage Block SSM 5.5 A1 Square Gage Block SSM 50.0 A1 Square Gage Block SSM 500.0 A1 Square Gage Block SSM 500.0 AA Square Gage Block SSM 6.0 A1 Square Gage Block SSM 6.5 A1 Square Gage Block SSM 60.0 A1 Square Gage Block SSM 7.0 A1 Square Gage Block SSM 7.5 A1 Square Gage Block SSM 70.0 A1 Square Gage Block SSM 75.0 A1 Square Gage Block SSM 8.0 A1 Square Gage Block SSM 8.5 A1 Square Gage Block SSM 80.0 A1 Square Gage Block SSM 9.0 A1 Square Gage Block SSM 9.5 A1 Square Gage Block SSM 90.0 A1 Square Gage Block Contact Starrett Features Premium Croblox Chromium Carbide Construction Rockwell "C" Hardness of approximately 71-73 Accuracy Grade: A1 Size: .95 In. x .95 In. .265 In. Hole in center, counter sunk (both faces) Specifications Made in America: Yes Shape: Square Material: croblox Chromium Carbide Unit Of Measure: Each Size: .650 In. Accuracy Grade: A1 Product Testimonials Write a product review Write a product review Comments* First Name* Last Name* Email* Occupation The information you provide will be used in accordance with the terms of our privacy policy. I agree to the privacy policy. Please provide the required information. Thank you for submitting a product testimonial on www.starrett.com. By submitting information to Starrett, you acknowledge and give express permission for the L.S. Starrett Company to use and share your statements.