Hordion 4Pcs 6mm Split Shaft Collar, Aluminum One Piece Shaft Locking Collar, 6mm Bore Diameter, 20mm OD, 8mm Thickness, with M4 Screws

Use for my knife sharpener,work well.

6mm ID shaft collars were exactly as described and functioned as stops for my sharpening guide shaft.

Perfect to use as a stop on my TSPROF Kadet Pro 6mm guide rod. The hex key adjustment is a bit cumbersome when adjusting.

Works great for Xarilk Gen 3. No notes.

These work well. I use them as stops. Good price.

Exactly what they're supposed to be, good quality, and there you go.

Yes these work well for shaft stops on a 6mm shaft like the Xarilk Gen 3 sharpener. However the set screws are not m4, they are m3. The difference being you will need a 2.5mm hex wrench to tighten them properly. I don't know if this is a recent change or they just mistyped the size. I purchased 2 sets and they were both the same. Except for needing a smaller hex wrench, they work perfectly.

These seem to be good collars so far. I like having only one screw to adjust. I'm still trying to figure out what size the set screw is (metric? or SAE?).