2pcs blocks, industrial tools precision 25-50-75mm blocks, 23 holes milling parallel terminal block milling machine accessories

? ??? 【23 Hole Assortment】 - 23 holes including (5) 3/8-16 tapped holes for clamps and (18) unopened holes. ? ??? 【All kinds of machine tools】 - Ground and hardened on all sides, suitable for all types of machine tools. ? ??? 【】 - High-precision milling parallel terminal block, accuracy up to 0.0001". ? ??? 【Application】 - Used for installation, layout and inspection work. ? ??? 【Material】 - It is a hexahedron made of hardened steel.