The Drive Tool for E-Z Hex Threaded Inserts (Internal Threads: 5/16-18, M8)E-Z LOK Drive Tools speed the installation of solid threaded inserts for metal, Knife Thread Inserts for hard wood and Hex Drive Thread Inserts for soft wood. A standard hex shaft allows for the use of power drills or drill presses in higher volume installations. Both styles quickly drive in the inserts without time consuming thread engagement.