The Restrap Light Mount is a useful accessory that allows lights to be mounted to any M5 threaded mounting point, leaving the handlebar free for attaching bags or other accessories.
By mounting the lights in different locations, such as the middle of the fork, dropouts, or the cockroach mounts on the back of the frame, you keep the lights out of the way of luggage that can block your visibility.
As a secondary function, it also serves as a tool for threading/removing the crank bolt on Shimano cranks.
