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Feature
Our Part # ALL-55550Set contains matched pair of 123 blocks, five 3/8-16 stainless socket head cap screws, hex key, and case (may be red or blue). Blocks 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. Dimensions- 1" x 2" x 3", 2.8 lbs. weight Cross drilling design allows for efficient use of lower weight with maximum strength