Description Impact rated 1/4"; quick change hex shank 3x the life 1/4"; quick change hex shank on 1/16";-1/4"; drill bits #1, #2" and #3 square, Phillips insert bits and T10-30 torx insert bits While most screw driving bits are simply compatible with impact drills and drivers, IRWIN; Impact Performance Series(tm) fastener drive bits are engineered for impact tools. These forged bits fit fasteners precisely, so they won't strip, and they're manufactured with heavy-duty, cold-forged, high-grade steel, so they'll withstand extremely high torque output. Plus, a black oxide finish resists corrosion. With three times longer life than traditional screw driving bits, IRWIN's Impact Performance Series screw driving bits will stand up to the most rigorous use and unforgiving jobsite conditions imaginable. When you need tools that work as hard as you do, IRWIN delivers Impact rated 1/4"; quick change hex shank 3x the life 1/4"; quick change hex shank on 1/16";-1/4"; drill bits #1, #2" and #3 square, Phillips insert bits and T10-30 torx insert bits While most screw driving bits are simply compatible with impact drills and drivers, IRWIN; Impact Performance Series(tm) fastener drive bits are engineered for impact tools. These forged bits fit fasteners precisely, so they won't strip, and they're manufactured with heavy-duty, cold-forged, high-grade steel, so they'll withstand extremely high torque output. Plus, a black oxide finish resists corrosion. With three times longer life than traditional screw driving bits, IRWIN's Impact Performance Series screw driving bits will stand up to the most rigorous use and unforgiving jobsite conditions imaginable. When you need tools that work as hard as you do, IRWIN delivers