Power Driver Compatible Tool Type Drill Press Power Drill Compatible Insert Type Hex Drive Threaded Inserts Knife Threaded Inserts Solid Threaded Inserts Compatible Internal Thread Size 3/8 In.-16 3/8 In.-24 M10 Compatible External Thread Size 9/16 In.-12 Material Steel Overall Length 33/64 in Product Type Drive Tool Compatible with Grainger Part Number 4ZE20 Compatible with Manufacturer Model Number 329-6 Features Install Slotted Inserts without Engaging the Internal Thread