uxcell Metal C20-ER16A-150L Straight Milling Chuck Holder for ER16 Collet Product Name : Straight Collet Milling Chuck Holder;Fit for : ER16 Collets;Size : C20-ER16A-150L Material : Metal;Color : Gray, Black;Shank Dia : 20mm/ 0.78" Shank Hole Inner Dia : 10mm/ 0.39";Shank Length : 150mm/ 5.9";Total Length : 180mm/ 7" Nut Hole Dia : 13mm/ 0.5";Nut Size : 25 x 25mm/ 0.9" x 0.9"(L*W) Net Weight : 370g;Package Content : 1 x Straight Collet Milling Chuck Holder