BT40-ER25-060 ER Style Collet Chuck Collet chucks ER Series is Europe's most popular collet system used to maintain concentricity for drilling and milling process. Features & Benefits Collapsing collet design for versatile used on a range of diameters Designed to maintain high concentricity for accuracy Long reach options available to give access into deep recesses Typical Applications Drilling Milling Notes BT = BT-MAS 403 GBP 0.00 1