Makita B-34942 Impact Gold Number 2 Phillips Insert Bit, 4-Pack Designed exclusively for high-torque impact drivers Precision-fit tip engineered to prevent "cam-out" and stripping High-quality steel engineered for use with impact drivers Combine with an Impact GOLD bit holder to last up to 15X longer than standard insert bits Ideal for driving screws in a wide variety of heavy-duty fastening applications