Adapter to hold MiniDSP Umik-1 calibration microphone on a standard camera tripod mount. Recommend threading the bolt into this adapter a couple of times before clipping in the mic. It's fairly snug but after initial threading it holds very well. Microphone is held in place by pressure fit which is also very snug. Depending on your printer, check that all edges are smooth and sand if needed to prevent any scratching.