for collets DIN 6343
simple, low priced and in spite of this a fully functional inner stop for collets to DIN 6343 can be used for , , and absolutely firm seat quick assembly collet shanks are not deformed clamping of the collet is not effected can also be used as stop for hollow parts
Screw in the three (resp. four) cross screws totally and insert the stop into the collet, so that the cross screws are visible in the slots of the collet. Now screw out the cross screws and tighten the stop with the lock-nut.