2pcs/set 25-50-75mm Hardened Steel Blocks, 0.005" Precision Matched Machinist, 123 Milling Tool 23 Holes 1-2-3" Block Gauge ,Durable Construction

Material: Hardened steel. Size: approx. 2.5*5*7.5 cm/ 1*2*3"(L*W*H). Idea for mounting work for precision. Used for set-up, layout and inspection jobs. Suitable for all kinds of machine tool.