Quick note: the number 394118050 corresponds to a genuine Makita bayonet lock / spring retainer used on petrol-powered disc cutters — I'll describe it below so you can order the correct replacement for your tool.

Makita 394118050 — Bayonet lock / spring retainer (original Makita)

- What it is: a small spring-loaded bayonet lock / retainer that secures the bayonet-style wheel/guard assembly on Makita petrol disc cutters. It’s the metal spring clip that engages the tool’s bayonet slots and holds the cutting wheel or guard firmly in place during operation.

- Why fit matters: this part restores the original bayonet locking action so the wheel and guard sit true and don’t wobble; it’s the correct, original Makita replacement designed to match the tool’s mating slots and retaining geometry.

- Typical use: made for Makita petrol disc cutters / cut-off saws where the wheel/guard uses a bayonet-style attachment; installed in the tool’s wheel/guard coupling and replaces a worn or broken retainer spring.

- Example models it fits (representative): DPC6400, DPC6410, DPC7300, DPC7311, DPC6200 and DPC7301 petrol disc cutters.

- Supplied as: single genuine Makita part (the same part number used in Makita parts diagrams and spares lists). Replacing this part returns the original locking action and safety of the guard assembly.

If your tool uses a bayonet-style wheel/guard and its retainer spring is missing, stretched or broken, this original Makita 394118050 restores secure, true mounting so you can get the cutter back to safe service.