The black Pad Lock Guitar Strap from Planet Waves offers a new spin on one of the oldest tricks to securing guitar straps to the end pin of a guitar. By inserting a rubber washer over the end pin, your guitar strap stays safely and easily in place no matter how much you move around. The Pad Lock utilizes the same concept but builds the rubber washer into the strap; so there are no extra parts to lose and no additional hardware to install.