For turning and facing as well as knurling. Supplied with a set of high speed precision ground lapped medium diamond knurls. Dimension 3/4" x 3/8" x 1/4". Tool Specs: A: 1", B: 2-5/8", C: 1-3/4", E: 5/8", E1: 1/2". Tool Bit Sizes: 1/4 - 5/8" (not included).