The Cateye BM45 Bar End Mirror is a small rear view mirror designed to fit on any road or commuting bike. The Cateye BM45 allows you to quickly see whats behind you which is especially useful when attempting right turns on busy roads. Using the BM45 mirror lets you see what vehicles behind are doing without having to turn your whole head away from the road in front of you. This can also be really helpful for people with limited mobility who may stuggle to fully turn their head while retaining control of the bike.