Features:_x000D_ 1. It is a hexahedron which is made of hardened steel._x000D_ 2. Ground and hardened on all sides, suitable for all kinds of machine tool._x000D_ 3. Used for set-up, layout and inspection jobs._x000D_ 4. High accuracy milling parallel clamping block, accuracy up to 0.0001"._x000D_ 5. 23 holes include (5) 3/8-16 threaded holes for clamping and (18) unopened holes._x000D_ _x000D_ Specification:_x000D_ Condition: 100% Brand New_x000D_ Item Type: 23 Holes Clamping Block_x000D_ Material: Hardened Steel_x000D_ Accuracy: 0.0001"_x000D_ Size: Approx. 25 * 50 * 75mm / 1 * 2 * 3in_x000D_ _x000D_ Package List:_x000D_ 2 * Blocks_x000D_ _x000D_ Note:_x000D_ 1. Please allow slight error due to manual measurement. Thanks for your understanding._x000D_ 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.