Jacobs Chuck 30354 3/8-Inch Keyless Chuck for 3/8-Inch 24 Thread Spindle - DiZiWoods Store
three/eight", 10mm capability, skilled keyless chuck, new ratcheting motion, chuck clicks when the drill bit is tight, reduces bit slippage, can be utilized on hammer drills, three/eight - 24 mount.This are hex keys This are extremely sturdy That is manufactured in China