findmall 5 Matched Pairs Accuracy Steel 1 x 2 x 3 Inch Blocks 23 Holes .0002" Machinist Milling

Heat treated and case hardened to HRC 57-61

Made of accuracy-grade tool steel hardened and ground on all 6 sides of block

Accuracy and squareness on all sides 0.0002"

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- 1" x 2" x 3"