The Planet Waves TurboTune Peg String Winder is just the tool to make changing your strings easier and faster than ever. Works on most instruments. It features a steel shaft that snaps into a cordless power screwdriver for power changes or simple use the included, convenient snap-on hand crank. Glow in the dark blue. It easily slips over the tuning machine-peg for an almost effortless string change. Fast and easy!