D'Addario Ergonomic Peg Winder 

The D'Addario Ergonomic Peg Winder with bridge pin puller is precision molded and specially designed to fit virtually all guitars, basses, ukuleles, banjos, and mandolins. Unlike most other peg winders, the D'Addario Peg Winder is ergonomically designed and built tough to withstand years of use. A great way to have easier and faster string changes.