Irwin 10508168 300mm 1/4in Quick Change Extension Bit Holder The Irwin Lock-n-Load Quick Change Extension Bit Holders have a LOCK-N-LOADâ„¢ System for one-handed quick release. The jaw design holds bits securely on 6-flatted shanks, as well as ball detent bits. A carbon steel construction sleeve and body ensures durabilty and long life. Irwin Lock-n-Load Quick Change Extension Bit Holder Specifications: |