This stand attaches to a folding music stand and can hold a smartphone, tuner, metronome, etc. Features: * Made with a 3D printer; handmade * Compatible with folding music stands (board thickness approx. 1mm) * Non-slip tube prevents items from falling * Easy, one-touch installation; no tools required * Designed to not obstruct page turning Set Contents: * Left and right parts, 1 set *Music stand not included.