Retaining Ring, M21 External

Finally, a retaining ring that actually fits a 21mm shaft without any extra filing — the thickness is just right for my lathe project. Snapped right into the groove with minimal effort.

Exactly the right fit for my 21 mm shaft, and the external profile sits flush without any wobble once snapped into place. Packaging was plain but sturdy, so the ring arrived undamaged and ready to use.

The inner groove seats cleanly on my 21mm shaft without any filing, and the fit is snug enough that I trust it under load. Took me a minute to get the pliers seated right, but once it clicked in, it held firm.