TEKTON 29432 Quick-Change Power Driver Bit Set, 42-Piece Hardened, Chrome Vanadium Steel Bits with Corrosion-Resistant, Sandblasted Finish Screw Holder/Finder/Shooter Frees Hands to Position Materials While Fastening 3/8in Lock-on Extension Turns Any Drill Into a Power Socket Wrench Spring-Loaded Chuck Releases Bit with One Touch Quality Guarantee