These IRWIN Impact Performance Series #3 Phillips Insert Bits are built for maximum durability and long life with impact drivers. Each insert bit features precision-tip geometry to deliver superior fitment with reduced stripping and cam-out. Manufactured with heavy-duty, cold-forged, high-grade steel, these screwdriver bits are made to withstand high-torque output. A black oxide finish resists corrosion and increases the life of the insert bits.