Grizzly H7993 Silver and Deming, 8-Piece Stepped drill shanks fit 1/2-Inch drill chucks high speed steel for long life set includes: 9/16-Inch 5/8-Inch 11/16-Inch 3/4-Inch 13/16-Inch 7/8-Inc Set includes: 9/16-Inch 5/8-Inch 11/16-Inch 3/4-Inch 13/16-Inch 7/8-Inch 15/16-Inch and 1-Inch bits