Interlocking ribs enhance grip and torque for secure fastening
Compatible with all 1/4 inch bit holders for versatile use
Interchangeable with standard screwdriver bit components for easy replacement
Works with most heat-treated and case-hardened screws for reliable performance
Summarized by Shop
3 x 1 Phillips ACR Insert Bit . Phillips ACR insert 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.