Collet Set ER40 Face Shape Round Max Size 0.8000 in Overall Length 1.8100 in Collet Type ER40 Head Dia 1.6100 in Compatible with Product Type BR Standard Collet Chucks DIN 6499 Collet Pockets DR Standard Collet Chucks ER Standard Collet Chucks ESX Standard Collet Chucks RD Standard Collet Chucks