2 Pcs Black 13mm Dia Gear Drill Chuck Key Loosen Tighten Tool Item Name : Chuck Key;Pilot Diameter : 6mm/15/64" Gear Diameter : 13mm / 33/64";Teeth Number : 12 Overall Size : 6.5 x 3.7cm/ 2.55" x 1.45" (L*W);Color : Black Material : Metal, Rubber;Weight : 65g Package Content : 2 x Chuck Keys