Double wing nuts are used to lock it in playing position.

Buy at www.musicianscart.com Hohner KM4306 Big Harmonica Holder,Using a harmonica holder leaves your hands free to play a guitar or other musical instrument at the same time as a harmonica.,This harmonica holder is designed for use with most 10 hole model harmonicas making it smaller and lighter weight than some other models but it still offers a rubberized neck brace and sturdy frame., Double wing nuts are used to lock it in playing position.