uxcell&reg; ER32 Collet Clamping Nuts for CNC Milling Chuck Holder Lathe Product Name : Collet Nuts;Model : ER32 Hole Diameter : 27mm/ 1.1";Thread Diameter : 41mm/1.6" Overall Size(Approx.) : 44 x 23mm/ 1.7" x 0.9" (D*L);Material : Metal Color : Black;Net Weight : 144g Package : 1 x Collet Nuts