Collet Set ER16 Face Shape Round Max Size 0.2550 in Dia Overall Length 27.50mm ANSI DIN 6499 Class 2 ISO Collet Type Rigid Tap Head Dia 17.00mm For Shank Type Straight Coolant Fed Non-Coolant Through Compatible with Product Type BR or DIN 6499 Collet Pocket DR ER ESX RD Package Quantity 4