I did a search and emailed the company but I couldn't find an exact size. I went to both an autosupply place and Lowes, but the couldn't find a small size set, only monster ones with one or two, none of which looked small enough. I'm not even sure if the set screw is metric or SAE. Anyone have the size? I changed to LaBellas and I need to get this buzz off the strings and out of my head!!!!!!