Kobalt 22 Pc. Power Impact Driving Set 16 driver bits: 2 P1, 3 P2, 1 P3, 1 R1, 2 R2, 1 R3, 1 T15, 2 T20, 3 T25; 2 hex to square adapters: 1 Built-in magnet on back of bit holder for convenient use and easy access Short nut drivers and hex to square adapters are designed to fit snugly into torsion bit holder for Impact driver compatible Black oxide finish prevents dulling and resists corrosion