uxcell Black Rubber Drill Chuck 13mm Dia Gear Size Key Loosen Tighten Tool Item Name : Chuck Key;Pilot Diameter : 6mm/15/64" Gear Diameter : 13mm / 33/64";Teeth Number : 12 Overall Size : 8 x 3.7cm/ 3.1" x 1.45" (L*W);Color : Black Material : Metal, Rubber;Weight : 38g Package Content : 1 x Chuck Key