Features 【High Quality Material】: It is a hexahedron made of hardened steel, which is strong and wear-resistant and has a long service life. 【High-precision】: High-precision milling of parallel clamps, the accuracy can reach 0.0001". 【23 Holes】: The 23 holes include (5) 3/8-16 threaded holes for clamping and (18) unopened holes. 【Suitable】: Grinding and hardening on all sides, suitable for various machine tools. 【Use】: Used for setting, layout and inspection work. Features: 1. It is a hexahedron which is made of hardened steel. 2. Ground and hardened on all sides, suitable for all kinds of machine tool. 3. Used for set-up, layout and inspection jobs. 4. High accuracy milling parallel clamping block, accuracy up to 0.0001". 5. 23 holes include (5) 3/8-16 threaded holes for clamping and (18) unopened holes. Specification: Condition: 100% Brand New Item Type: 23 Holes Clamping Block Material: Hardened Steel Accuracy: 0.0001" Size: Approx. 25 * 50 * 75mm / 1 * 2 * 3in Package List: 2 * Blocks Package List