23 Holes 2Pcs Precision Blocks Hardened Steel 1-2-3 Blocks 0.0001" Precision Matched Machinist 123 Milling Tool

Features: 23 holes includes (5) 3/8-16 threaded holes for clamping and (18) untapped holes Specifications: Material: Hardened steel Color: Silver Size(L*W*H): Approx 2.5 x 5 x 7.5 cm/ 1 x 2 x 3" Packaged included:2 x blocks