Thumb Fin Original – Bass Thumb Rest

More comfort. More control. No drilling. Thumb Fin gives your thumb a comfortable, adjustable place to play. Strong suction cups keep it in place, and it moves between instruments without leaving a mark. Ergonomic and adjustable Works on bass, guitar, ukulele, and more Leaves your instrument undamaged Just wipe the surface and suction cups clean, stick it on, and play. Applying it to a matte-finish instrument? Add contact paper to create the non-porous surface Thumb Fin needs to attach securely.