Guitar Ergonomic Peg Winder for bass guitar with built-in string stretcher is precision molded with a solid body and overmolded with soft comfort grips. Its specially designed winder fits virtually all bass guitars. The handle has soft, polymer sides for a comfortable, yet firm grip and is ergonomically designed to better fit your hand. Plus, the Planet Waves Ergonomic Peg Winder has a built-in string stretcher, which makes tuning your guitar easier than ever before.