Korpa 
The Universal Speedwinder features a a lightweight design with low-friction rotation and a comfortable, ergonomic handle for fast string changes that go easy on your hand and wrist.
The Long Story
The Universal Speedwinder makes for fast string changes that are easy on your hand and wrist, featuring a lightweight design with low-friction rotation and a comfortable, ergonomic handle. The universal head fits most guitar and bass tuning machines, and the handle includes a handy bridge-pin puller that stays tucked away when you don’t need it. Give a fresh set a quick spin with Dunlop’s Universal Speedwinder.