Uxcell a15060800ux0208 C12-ER11A-100L Collet Chuck Holder Straight CNC Milling Extension Rod Product Name : Straight Collet Chuck ; Model : C12-ER11A-100L ; Fit for : ER11 Collet Material : Metal ; Color : Silver Tone, Black ; Shank Dia : 12mm/ 0.47" Shank Length : 100mm/ 4" ; Total Length : 125mm/5"