Dremel 4485 Quick Change Collet Nut Kit 5 PIECES (1) 1/8 In Collet, (1) 3/32 In Collet, (1) 1/16 In Collet, (1) 1/32 In Collet And Collet Nut Allows You To Quickly Change Collets To Accept Bits With Shanks Of 1/32 - 1/8 In