This is a V-belt that is used on several types of tillers from top manufacturers. It's responsible for making sure the tiller tines rotate within the tiller. The belt is made from durable rubber but over time, it can stretch out, break, or wear out. The more the tiller is used, the more likely it is that the V-belt will need replacement. Sometimes mechanical issues can also cause the belt to wear out more quickly than expected. If the belt is overly worn, it can cause the tiller to operate inefficiently since the belt can slide off the pulley. With a V-belt that is broken, the tool will no longer operate until it has been replaced. This V-belt is sold as an individual part. It is an authentic OEM replacement part that is sourced directly from the manufacturer. The part is made to be used with tillers manufactured by Yard-Man, Craftsman, Troy-Bilt, Huskee, Montgomery Wards, Bolens, MasterCut, MTD, Yard Machines, and Cub Cadet.