This IRWIN Impact Performance Series #1 Square Recess Power Drill Bit features impact drivers for high durability and long life. The precision-tip geometry on these drill bits delivers superior fitment, helping to reduce stripping and cam-out. Each of these screwdriver bits features heavy-duty, cold-forged, high-grade steel manufacturing to withstand high-torque output, while a black oxide finish on the insert bits helps resist corrosion and increase life.