Woodboring Bit Extensions Irwin Lock-n-Load Quick Change Extension, 1/4" Quick Change Bit Holder Quick Change Drill Bit Extension 6 QUICK CHANGE LOCK NLOAD BIT HOLDER | Grey Wolf Safety Find many great new & used options and get the best deals for IRWIN Industrial Tool Quick Change Woodboring Bit Extensions 4935704 at the best online prices at start of prefixes end of prefixes start of suffixes IRWIN 4935705 Bit Holder, 1/4 in Drive, 1/4 in Shank%2... Highlights: Carbon steel construction sleeve and body for durability and life Lock-n-Load system for one-handed quick release Patented jaw design holds bits securely on 6-flatted shanks, as well as ball detent bits 1/4 quick change range now holds insert bits; magnetic for holding Diameter: 1/4 Length: 6, ., ., .