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: 1-7/16", B: 3-3/4", C: 2-1/2", E: 1", E1: 3/4". Tool Bit Sizes: 1/2 - 1" (not included).