Uxcell a11010300ux0228 Industrial Drill Chuck Key Tool 22mm x 16mm 11 Teeth Design Item Name : Chuck Key; Maximun Diameter : 22mm Minimum Diameter : 16mm; Central axis Diameter : 8mm Number of teeth : 11; Measurement : 83 x 45mm / 3.37" x 1.77" (L*W)