Hard to find as a replacement part! Chromed, rectangular head wing screw fits Gotz and some other European bass endpin sockets. Save having to replace your entire endpin assembly over a lost or broken screw! We are still researching other brands with which this may be compatible, so for now, we can just say it works with Gotz endpins. If your endpin screw is broken off, and you can't remove the remaining piece, see our repair department for having it extracted. If it's broken and you don't know what screw will fit in it, you can even mail in your entire endpin socket and we will mail it back to you with a new screw (at additional cost).