I recently bought some stitch markers in bulk* knowing they might have some roughness around the locking head.  But the price was right.

So after a couple of swipes with a little help from an emory board, everything is smoothed out.

One down 299 more to go!

*Mr. Aitch :  Why does anyone need 300 stitch markers?

Me:  Because they lose them…

[…or are stuck in some (forgotten) Unfinished Project.]  😉