/ Precision Measuring Tools / Surface Plates / Surface Plate Accessories / Five-Face Master Squares / G-81919 * Not actual product image G-81919 Five-Face Granite Master Square 81919 Five-Face Granite Master Squares 12" x 12" x 3" Five-Face Granite Master Square - Grade AA Laboratory Five-Face Granite Master Squares provide an excellent, economical way to check X, Y and Z axis alignment on CNCs and CMMs. They can also be used in the same way as a steel square for direct checking of squareness and straightness. Specifications Product Testimonials Other similar products G-81919 Five-Face Granite Master Square G-81920 Five-Face Granite Master Square G-81922 Five-Face Granite Master Square G-81923 Five-Face Granite Master Square G-81925 Five-Face Granite Master Square G-81926 Five-Face Granite Master Square G-81931 Five-Face Granite Master Square G-81932 Five-Face Granite Master Square G-81933 Five-Face Granite Master Square G-81934 Five-Face Granite Master Square Contact Starrett Specifications Made in America: Yes Size LxWxT (in): 12 X 12 X 3 Grade (U.S.): AA Laboratory Size LxWxT (mm): 300 X 300 X 75 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.