TEAM FIVE STAR TIRE BREAK IN DRILL TOOL. CAN BE USED WITH 12 OR 17MM HEXES. STAINLESS STEEL SHANK AND REPLACEABLE SCREW. BLACK FINISH 30MM KNOB FOR SECURE FASTENING OF WHEEL TO TOOL WITHOUT HURTING YOUR FINGERS OR DAMAGE TO HEX FROM THE TOOL POSSIBLY LOOSENING UP AS EASILY AS OTHER MODELS.