The 6 PC Wood StubbyBit Set are 2.32 inch long drill bits precision ground from one piece of high speed steel for long lasting performance. Brad point tips for pin point accuracy when drilling holes in wood. 1/4 inch hex shaft fits most standard and quick change chucks. Includes 3/32, 1/8, 3/16, 1/4, 5/16, and 3/8 inch bits