The Deep Socket Tool 10mm was specifically made to suite the 14.100 Super UT and the 17.800 Post Anchor as both these models have a 10mm Hex shape as feature on the shafts which provide a positive nonslip grab on the screw shafts during installation. The pack includes 3/8" socket adaptor together with the Deep Socket, this will allow the installer fast and easy installation of the shaft using a cordless drill or impact driver.