edcfans3 Pack Thumb Stud Replacement for Buck 110 Knife with Hex Wrench (Black+Sliver+Brass)

Easy to install. Tight fit, extremely tight. Works well. Set screw got stuck. Impossible to remove now. Not a problem, because I like it where it is! Place yours carefully. If you want one get this one!

A simple and super helpful little addition to moat traditional pocket knifes. Tightens to fit a variety of pocket knifes. I've got one on a Buck 110, a Lord and Field Farmhand Lock back and a small brass scaled clip point Rough Rider. The downside is the allen wrenches included are less than sturdy so really snugging the thumb stud down takes a toll thankfully they included three allen wrenches cause only one is still usable.

Turned my Cold Steel Kudu into a quicker opening knife. Ring-lock knives are pretty quick to close once you get the knack for it, and the thumb stud allows it to open about as quickly.The stainless one holds on pretty good, the black one does just as good, but the brass one didn't work as well for me. These are small enough that you will probably never see it again if it falls off outside in the grass.One of these could make a Kudu ring-lock faster (and safer) to use than all their quick-draw videos show.ADDITIONAL - The blue ones attract a magnet, so I doubt they are brass.Loctite would probably work with the brass ones, I never tried.And the brass ones are easier to file down to fit thicker blades, so maybe save your brass thumb stud for your largest blade and Loctite it to prevent it from falling off.

Fits my fully serrated Spyderco perfectly.

I have a South African Okapi ratchet knife that this fit perfectly on. Now I can open it with one hand.