Material: Hardened steel heat treated and case hardened to hrc 57 to 62
Advantages: Cross drilling design allows for efficient use of lower weight with maximum strength accuracy with squareness on all sides within 0.0003 per inch
Use: Be used outside a vise utilizing the pre-drilled holes, their applications are expanded by bolting them together
Include: 1 Pair accuracy gage block 2 x 4 x 6 inch