For trade or sale: One pair Chrome Star Grover Artist Strap Buttons. "Attach your strap with style"! These are two-piece buttons. There's a bottom part that's screwed to the bass, like a typical strap button. The top part (the star) screws into the lower part. There are rubber O-rings between the two parts and the bass, so they don't loosen-up on their own. Here's the manufacturer's description, from https://www.grotro.com/grover/grover-accessories/artist-strap-buttons: "These new buttons offer players the opportunity to attach their strap with style. They keep the players strap locked without the hassles or expense of traditional strap locks. The two-piece screw on design lets the player change styles easily while the oversized die-cast buttons and custom-fitted o-rings safely secures the strap. "All hardware is provided and the installation process is simple. Replaces original strap button with no modification or damage to instrument." These are like new, with the packaging. I installed them once then removed them. Nothing wrong with them, just not my style. Note that these are strap buttons, not strap locks. FT: I'd prefer to trade these - make me an offer. Some ideas: Strings, med. light or light, flatwounds or other smooth surface Strap Set of bass knobs Set of Boss pedal knobs Other parts for basses or pedals Or FS: New lower price! $5, including shipping to continental USA, Paypal only.