Root's decks come with fenders or brakes to satisfy every rider out there. When you need a replacement brake, pick up a Root Industries metal replacement brake for your pro scooter deck. There were SCOOTER BRAKES and then there were fenders. So, which should you buy? Easy, if you want to be able to stop, pick up a brake, which you can actually press down on with your rear foot to stop your whip. If you don't want that rear brake to inadvertently stop your wheel when your foot hits it on a big landing, you want a fender. Please note that a fender does not function as a brake and will not stop you. In other words, you're going to wear out a lot of shoes. The Root brake is a steel brake that works with the following wheel diameters: 100mm,110mm,115mm,120mm and the following wheel widths: 24mm. Should you purchase metal or plastic brakes? It depends. If you are looking for the lightest possible setup - go nylon or plastic. If you want a durable brake that's going to last a long time, pick up a steel brake.