While most screwdriving bits are simply compatible with impact drills and drivers IRWIN Impact Performance Series fastener drive bits are engineered for maximum durability and long life with impact drivers. These bits are forged rather than milled so they fit fasteners more precisely which reduces stripping and increases the life of the bit itself ”“ IRWIN's Impact Performance Series bits have three times longer life than traditional bits. Manufactured with heavy-duty cold-forged high-grade steel they'll withstand extremely high torque output. Plus a black oxide finish resists corrosion and increases the life of the bit.

This set includes the following items:

• 2.25-Inch Magnetic Bit holder with c-ring,
• 3/8-Inch Socket adapter
• 3-1/16-Inch Compact Magnetic Screw Guide
• 3 nut setters
• 6 x 2-Inch Power bits, including #2 Phillips, #2 Square Recess and T20, T25, and T30 Torx bits. 
• This set also has 21 insert bits that include all three Phillips sizes, all 3 Square Recess sizes, T10, T15, T20, T25, T27, T30 and T40 Torx bits.

• SKU Irwin 33pc Impact Drive Screwdriver Bit Set