Accuracy with Squareness on all sides within .0001 per inch Consists of 5 tapped holes 5/16 - 18 for clamping and 6 untapped holes drilled through Country of Origin: CHINA Item Package weight : 0.975 kilograms

Hardened and precision Ground on all 6 sides of each block. Accuracy with Squareness on all sides within .0001 per inch. Consists of 5 tapped holes 5/16 - 18 for clamping and 6 untapped holes drilled through.