Sure-Grip Premium T-Allen Wrench standard 3/16" for Rollerkate plate toe stop locking screw for all Sure-Grip plates and Sure-Grip Classic king pin trucks. Also fits LABEDA Pro-line plates. The right size tool for this application and faster and easier than a conventional Allen key! (NOTE: Doese not fit PowerDyne , MOTA, PILOT, VENUS or APOLLO Allen Toe Stop Screws, for those please select this tool.)