TOOGOO(R) 16mm 5/8" Pilot Size 11 Teeth Design Drill Chuck Key Tool Item Name : Chuck Key;Pilot Diameter : 16mm / 5/8"(0.630") Overall Size : 9 x 4.8cm/ 3.5" x 1.9" (L*W);Color : Black Material : Metal Weight : 61g Package Content : 1 x Chuck Key