uxcell 1.5mm to 13mm Capacity 1/2-20UNF Mount Key Type Drill Chuck Product Name : Spanner Drill Chuck;Capacity : 1.5-13mm / 0.06"-0.51" Mount : 1/2-20UNF;Drill Chuck Outer Diameter : 4cm / 1.6" Drill Chuck Total Length : 7 cm / 2.8";Key Size : 7.8 x 4cm / 3.1" x 1.6" (L*W) Color : Silver Tone, Black;Material : Steel, Metal Net Weight : 320g;Package Content : 1 x Drill Chuck1 x Key Tool