Century Drill and Tool 66921 Impact Pro High Impact Torsion Bits and Accessories, 25-Piece Impact Pro torsion bits are rated for maximum life in high torque drivers Designed to absorb the shock during Impact applications 25 piece set includes magnetic bit holder insert bits in 1 each of #1 2 each of #2 and 1 each of #3 Phillips #1 #2 and #3 Pozi 6-8 8-10 and 10-12 Slotted 1 each of #1 2 each of #2 and 1 each of #3 Square Power bits in #1 #2 and #3 Phillips 8-10 and 10-12 Slotted and #2 and #3 Square with 1/4-Inch 5/16-Inch and 3/8-Inch Impact Pro Nutsetters