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: 7/8", B: 2-1/2", C: 1-9/16", E: 1/2", E1: 3/8" . Tool Bit Sizes: 3/16 - 1/2" (not included).