The new 3mm Hex Hider works to unlock the nut at the headstock for easier fine tuner resets, as well as the string lock screws at the bridge for quicker string changes on all authentic Floyd Rose Tremolos and many licensed versions. The patented design uses a powerful Neodymium magnet to hold the tool in place when in use and is stored on the back of the headstock by magnetically gripping onto any metal tuning machine, requiring no drilling or permanent installation. It will even stay attached during the most thrashing of stage movements!