Caterpillar (CAT)-style premium aftermarket penetration bucket tooth for the J550 series. Part reference 9W8559. Penetrating profile for loosening and excavating compacted material. Related retention: pin 6Y8558; retainer 8E5559. Adapter option: 107-3554 (weld-on); select the correct lip thickness and mounting. PETRAX premium aftermarket range for major brands including CAT, Komatsu, Volvo, Hitachi, John Deere, JCB, Case, New Holland, Hyundai, Doosan/Develon, Bobcat, Kubota, Takeuchi and Sany. This item fits only the specified system and matching mounting dimensions.