uxcell CNC Lather Milling Straight Shank Collet Chuck Holder C12-ER16A-100L Product Name : Straight Collet Chuck;Model : C12-ER16A-100L;Fit for : ER16 Collet Material : Metal;Color : Silver Tone , Black;Shank Dia : 12mm/ 0.5" Shank Hole Inner Dia : 7mm/ 0.28";Shank Length : 100mm/ 4";Nut Hole Dia : 13mm/ 0.5" Hex Width : 25mm/ 1";Overall Size : 135 x 28 mm / 5" x 1.1" (L*Max.D) Net Weight : 132g;Package Content : 1 x Straight Collet Chuck