ER11 Collet Clamping Nuts for CNC Milling Chuck Holder Lathe Product Name : Collet Nut;Model : ER11 Hole Diameter : 9mm/ 0.35";Thread Diameter : 14mm/0.55" Overall Size(Approx.) : 17 x 13mm/ 0.67" x 0.51" (D*L);Material : Metal Color : Black;Net Weight : 14g Package : 1 x Collet Nut