The ergonomic design of the D'addario pro-winder makes string changes easier than ever before with it's built-in clippers, bridge pin puller and peg winder all rolled into one product. The peg winder is also designed to fit on virtually all guitars, banjos and mandolins, truly making it a must have for every instrument case. From the Manufacturer Unlike ordinary peg winders, the patented Pro-Winder is a high-quality peg winder with a built-in clipper, bridge pin puller and string stretcher. The Pro-Winder is designed to fit virtually all guitars, banjos, and mandolins. Ergonomically designed with durable hardened steel wire cutters, the Pro-Winder is the ultimate all-in-one restringing tool. Keep one in every case! Also available in a bass guitar version. Planet Waves, part of the D'Addario family of brands, is known for innovative, problem-solving, quality musical accessories. Planet Waves offers a complete line of award-winning accessories including cables, picks, tuners, capos, straps, humidifiers, maintenance tools and more.