uxcell CNC Collet Chuck Repair Parts High Speed ER25 Clamping Hex Nuts Product Name : Collet Nuts;Model : ER25 Hole Diameter : 21mm/ 0.8";Thread Diameter : 32mm/1.3" Overall Size(Approx.) : 42 x 21mm/ 1.7" x 0.8" (D*L);Material : Metal Color : Black;Net Weight : 95g Package : 1 x Collet Nuts