Murray, Noma, Spirit, Dynamark, Ultra, Blizzard, canadiana, craftsman, and more. Used as is condition, shows signs of wear. Was taken out of a snowblower in operation. Upper worm gear 313862, 53732, 53732MA. Lower gear (brass) 53730MA, 1752500YP, 53730. Includes thrust washers and key. Snowblower gearbox worm gears. I cleaned up many of the sharp edges with a file around the outside.