uxcell C25 ER20A 150L Straight Holder CNC Milling Chuck Part Extension Rod Product Name : Straight Collet Chuck;Model : C25-ER20A-150L Shank Diameter : 25mm(1");Clamping Nut Diameter : 16mm(0.63") Shank Hole Diameter : 14mm(0.55");Overall Size : 34mm x 190mm(1.34"x 7.48") (Max.D*L) Material : Stainless Steel;Color : Silver Tone, Black Net Weight : 575g;Package Content : 1 x Straight Collet Chuck