Built for maximum durability and long life with impact drivers. Square and Phillips bits are forged rather than milled, so they fit fasteners more precisely, which reduces stripping and increases the life of the bit itself. 3X longer life than traditional bits. Manufactured with heavy-duty, cold-forged, high-grade steel to withstand extremely high torque output. Black oxide finish resists corrosion and increases the life of the bit. Includes the following Impact insert bits: 2 of #1 Phillips x 1", 3 of #2 Phillips x 1", 2 of #3 Phillips x 1", 2 of #1 square recess x 1", 3 of #2 square recess x 1", 2 of #3 square recess x 1", 1 each of T10 x 1", T15 x 1", T20 x 1", T25 x 1", T27 x 1", T30 x 1", and T40 x 1". Includes the following Impact Power bits: 2 of #2 Phillips x 2", and 1 each of #2 square recess x 2", T20 x 2", T25 x 2", and T30 x 2". Includes 1 each of lobular magnetic nutsetters 1/4" x 3", 5/16" x 3", and 3/8" x 3", 1 of 3-1/16" compact magnetic screw guide, 1 Impact socket adapter 1/4" to 3/8" x 2", and 1 of 2-1/4" Impact magnetic bit holder with C-Ring.