RDX 1-2-3 Blocks$14.95Precision ground and case hardened to Rockwell 48c. Fifteen holes on each face, three on ends and five on each side. Five holes tapped 3/8-16 for clamping operations. Cross drilled design for minimum weight and maximum strength.
RDX 3-Piece Inspection Set$36.00Consists of two 1-2-3 blocks and 5" x 1" precision hardened and ground sine bar. Blocks precision ground and case hardened, with five 3/8-16 tapped holes for clamping operations.