Kit Consisting Of A Special Collet Nut And Four Collets For Use With A Variety Of Dremel Tools, Attachments And Handpieces. Allows You To Quickly Change Collets To Accept Bits With Shanks Of 1/32" To 1/8". Kit Contains (1) Each 1/8" Collet, 3/32" Collet, 1/16" Collet, 1/32" Collet And Collet Nut.