This genuine replacement part is a MTD 8” bar for use with chainsaws.This chain bar is for use with chainsaw attachments. It is used to provide a seat for the chain. It is responsible for guiding the movement of the chain, the chainsaw's cutting element. A properly functioning chain bar is essential for the safe and reliable use of a chainsaw. The chain bar may become worn out or damaged due to extended use, and will require replacement. Wear on the guide bar is usually most severe on the underside of the bar. Remember to check the bar periodically to spot any wear or damage. Prior to working with this part, please refer to the original product manual for a full list of included parts and installation instructions. A wrench or allen key may be needed for installation of this part. Please note: For safety, always wear gloves and ensure unit is powered down prior to performing any installation or repair.This high quality OEM replacement part is sourced directly from the manufacturer, and it is sold individually. It is made of high-quality durable metal. This part is compatible with Troy-Bilt and Cub Cadet chainsaws.