Wire and St andard Gages 1/4 1/16 3/16 1/8 1/4 1/8 3/32 1/16 1/8 178, 178M Fillet or Radius Gages with Locking Device 1/32-1/2"/1-15MM These gages are very useful for tool and diemakers, machinists, screw machine operators, patternmakers and other mechanics to lay out and check radii of tools, dies, patterns, etc. Made in two English and metric sizes as listed below, each gage has leaves for measuring both concave and convex radii, with each leaf stamped with the radius size.Any one of the leaves can be securely locked in position by a locking device. Made of nicely finished, high quality steel. 272, 272M Fillet or Radius Gages 1/32-33/64"/0.75-13MM An external and internal radius on each leaf permits both concave and convex surfaces to be measured. The leaves are specially shaped for use in any position at any angle to measure fillets and radii in corners or against shoulders. Each leaf is stamped with the radius size and has an eccentric mounting for clearance between the leaf and the case when the gage is opened. 279 Fillet or Radius Gages .020-.4000 This gage is similar to our 272, except that it has twenty leaves with radii from .020-.400" inclusive.Nine leaves have concave and convex radii from .020-.10" in increments of .010", four leaves with concave and convex radii from .125-.20" in increments of .025", one leaf with concave and convex radii of .250", three leaves with concave radii only from .300-.400" in increments of .050" and three leaves with convex radii from .300-.400" by an increment of .050". Inch Reading Cat. No. EDP Range (Concave and Convex) Increments Leaves 178A 50664 1/32-1/4" 64ths 30 178B 50666 17/64-1/2" 32 Millimeter Reading Cat. No. EDP Range (Concave and Convex) Increments Leaves 178MA 50665 1-3mm 0.25mm 34 3-7mm 0.5mm 178MB 50667 7.5-15mm 0.5mm 32 Inch Reading Cat. No. EDP Range (Concave and Convex) Increments Leaves 272A 51296 1/32-17/64" 64ths 16 272B 51298 9/32-33/64" Millimeter Reading Cat. No. EDP Range (Concave and Convex) Increments Leaves 272MA 51297 0.75-5mm 0.25mm 18 272MB 51299 5.5-13mm 0.5mm 16 Inch Reading Cat. No. EDP Range (Concave and Convex) Leaves 279 51314 .020-.400" 20 178B 272A 279 330 F ixed G age S t andards