2Pcs/Set 25-50-75Mm Hardened Steel Blocks 0.005″ Precision Matched Machinist 123 Milling Tool 23 Holes 1-2-3″ Block Gauge

Material: Hardened steel Size: approx. 2.5*5*7.5 cm/ 1*2*3″(L*W*H) Idea for mounting work for precision. It is a hexahedron which is made of hardened steel. Ground and hardened on all sides. Used for set-up, layout and inspection jobs. Suitable for all kinds of machine tool. Height accuracy .0001″. Hardness HRC 57-62. 23 holes includes (5) 3/8-16 threaded holes for clamping and (18) untapped holes. The unique design makes your work smoothly.