IVY Classic Industries is dedicated to producing a comprehensive, quality line of power tool accessories and hand tools. IVY Classic Swift Bore 21-Piece High Speed Steel Drill Bit Set contains jobber length drill bits for drilling steel, wood and plastic. These bits are roll forged, with a two tone finish and black oxide flutes with a bright outer grind and are constructed out of hardened and tempered high speed steel. They feature a general purpose 118-degree standard point and come packaged in a sturdy metal case with a hinged index. Bits are clearly visible with sizes marked on the case. This 21-piece drill set includes: 1/16-inch through 3/8-inch in 1/64-inch increments as follows: 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4, 17/64, 9/32, 19/64, 5/16, 21/64, 11/32, 23/64, 3/8-inch drill bits. Shanks reduced to 3/8-inch.