/ Precision Measuring Tools / Surface Plates / Surface Plate Accessories / Granite Tri-Squares / G-81967 * Not actual product image G-81967 Granite Tri-Square 81967 Granite Tri-Squares 18" x 24" x 4" Granite Tri-Square- Grade AA Laboratory Three-Face Granite Tri-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-81961 Granite Tri-Square G-81962 Granite Tri-Square G-81964 Granite Tri-Square G-81965 Granite Tri-Square G-81967 Granite Tri-Square G-81968 Granite Tri-Square G-81969 Granite Tri-Square G-81970 Granite Tri-Square G-81971 Granite Tri-Square G-81972 Granite Tri-Square Contact Starrett Specifications Made in America: Yes Size LxWxT (in): 18 X 24 X 4 Grade (U.S.): AA Laboratory Size LxWxT (mm): 450 X 600 X 100 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.