It comes with in together 29 ( I forgot one in the pictures ) very small collets , some of them in brass but most in steel .
The attachment comes with a special key to open and close the caps for the collets .
Please note that the shank of the 8mm collet has no keyway . The new owner can , of course , make a keyway if necessary .
Shipping to Germany 10 USD , Europe 20 USD , worldwide 30 USD
See my other items for more horology .