Altoz 2500333 Rear Receiver Hitch Kit - This Rear Receiver Hitch Kit is for use with Altoz XP HD and TRX mowers. It is compatible with 540, 561, 610, 660, 720 and 766 models. The super strong hitch mounts easily over the bumper. It features a standard 1-1/4" x 1-1/4" trailer hitch receiver.