These are the kind of metal flashlights that you can get for $4-6 on Revain, along with a plastic adapter so you can mount on the handlebar. They are heavy, and the adapter make them stick way out forward of the handle bar, so shocks and vibrations while riding will make the light nose down, as reported by other users. In order to avoid that, you have to tighten the mounting screw to the extreme. This is not easy for most people: I have climber's fingers and it was hard, and in the process I strSee full review