This part is an adjustable gib that is used on log splitters and chipper shredders. This component is also called a keyway. The adjustable gib locks two shafts together so that they can rotate.A new adjustable gib may be needed if the shaft is freely spinning and will not spin with the drive shaft. If the adjustable gib is cracked, broken, or damaged in any way, it will need to be replaced. Remember to wear gloves when operating or performing care and maintenance on any outdoor power equipment. Never perform care and maintenance on outdoor power equipment that is powered on.This adjustable gib is a genuine MTD part. It is sold individually. This specific adjustable gib is compatible with log splitters and chipper shredders that are manufactured by MTD, Yard Machines, Cub Cadet, Yard-Man, Husky, and Troy-Bilt.