2610009839 supersedes older part numbers: 2610913818

Original Dremel / Bosch shaft-lock assembly (part no. 2610009839) — a small metal collar plus locking pin that restores reliable spindle locking on affected rotary tools.

This replacement includes the metal collar and the locking pin/retainer used at the front of the tool (the piece that engages when you lock the spindle); it’s designed to be fitted after removing the collet and collet nut and then replacing the worn collar/pin inside the housing.

Fits many rotary-tool models including Dremel 300, 3000, 800, 780 and 8000.

If the spindle lock slips or won’t hold your bit, this original replacement part gets you back to safe, accurate work.