Heat treated and case hardened to HRC 57-62. Made of precision-grade tool steel hardened and ground on all 6 sides of block
Accuracy and squareness on all sides within .0001"-.0002"
23 holes includes (5) 3/8-16 threaded holes for clamping and (18) untapped holes Cross drilling design allows for efficient use of lower weight with maximum strength, Dimensions- 25mm x 50mm x 75mm, 2.1 lbs. weight