uxcell 3 Pcs 6mm Dia Pilot 12 Teeth 17mm Dia Gear Spanner Drill Chuck Key Loosen Tighten Tool Item Name : Chuck Key;Pilot Diameter : 6mm Gear Diameter : 17mm/0.7";Shank Diameter : 6mm /1/4" Overall Size : 75 x 40mm/ 3" x 1.6" (L*W);Teeth Number : 12 Color : Black;Material : Metal Weight : 118g;Package Content : 3 x Chuck Key