The BIONIC 11/16 Kingpin/Click Adjustment Tool works with the ATOM Pilot Falcon and Eagle series plates as well other click action plates to adjust the 11/16" action click locknut. Also works great with older plates where a thin 11/16" wrench is needed to adjust the action nut when it is closest to the base of the boot, like: Dominion Aluminum Marathon, Sure-Grip century, Sure-Grip Classic, etc. An essential pro tool for your skate bag if you're skating on one of these plates!