Tap holders are dedicated sockets for thread cutting and repairing in narrow of difficult to reach spaces. They are designed to hold each size of tap securely and safely. Like other sockets, the tap holders include a general purpose square insertion drive, various accessories for socket wrenches can be attached. Input 1/2 Sq. Dr. Adjustable Tap Holder Min. 5.5mm Max. 1.2mm Length 69mm