The special traction drive belt is made from durable rubber, and it is responsible for helping to drive the edger forward. Edger belts are prone to wear and tear. They are a moving part that is used whenever the edger is operated. In some cases, they might start to fray or weaken, or they might break entirely. If the drive belt is not working correctly or is broken, the edger will not operate properly until the belt is replaced. Even if the belt has not broken entirely, it is a good idea to replace a worn belt before it does break. The authentic OEM replacement drive belt is identical to the belt that came with the machine. It is sold individually. The belt is specifically for use with edgers. It works on many models from Craftsman and Murray. When purchasing a replacement drive belt, owners should ensure they are choosing the right belt for their make and model.