2 x 2 Phillips ACR Power Bit

2 x 2 Phillips ACR Power Bit . A unique combination of alloys (nickel, vanadium and molybdenum) give these power bits a Rockwell hardness of RC 59-62 without the brittleness. ITM TECH3 power bits are the ultimate for the professional who demands and deserves only the best. ACR® Insert & Power screw driver bits have interlocking ribs that provide greater torque and grip when used with most heat treated and case hardened screws. ACR® insert bits will work with all 1/4 inch bit holders and are interchangeable with all standard screw driver bit components.