a standard winding mechanism, keys, knobs, and handles. Suit for music box enthusiasts, it allows you to create or repair your own music boxes. Simply install the movement into your chosen box, wind it up using the provided key, and enjoy the melodious tunes. Ideal for hobbyists and crafters looking to personalize their musical creations. Features -Color:Silver -Material:Iron -Size:2.50X1.50X0.60cm/0.98X0.59X0.24in -Diy assembly: this music box diy kit allows you to assemble your own music box, providing a experience and a touch to your creations -Standard spring mechanism: equipped with a standard spring mechanism, this kit ensures the stability and reliability of your music box, delivering consistent performance -Key knob handle: the included key knob handle makes it easy to operate and adjust the music, giving over the playback and enhancing user convenience -Versatile application: suitable for various music box projects, this kit meets diverse needs and allows you to create unique and beautiful musical pieces -Enhance your creations: add a touch of beautiful music to your projects with this music box diy kit, suit for enhancing the charm and appeal of your handmade items Package list: 16 x music box knob