Carbon steel construction sleeve and body for durability and lifeLock-n-Load system for one-handed quick releasePatented jaw design holds bits securely on 6-flatted shanks, as well as ball detent bits1/4" Quick Change range now holds insert bits; magnetic for holdingSpecificationsItem #DescriptionPack QTY49357031/4" Quick Change Bit Holder - 2" OAL649357041/4" Quick Change Bit Holder - 6" OAL649357051/4" Quick Change Bit Holder - 12" OAL649356513/8" Quick Change Bit Holder - 2" OAL349356523/8" Quick Change Bit Holder - 5-1/2" OAL349356533/8" Quick Change Bit Holder - 12" OAL349356547/16" Quick Change Bit Holder - 5-1/2" OAL349356557/16" Quick Change Bit Holder - 12" OAL349356567/16" Quick Change Bit Holder - 18" OAL3