The MTD 71705398 is a genuine 12-volt electromagnetic PTO clutch designed for a wide range of MTD, Cub Cadet, Troy-Bilt, Yard-Man, Bolens, Huskee, White Outdoor, and Ryobi lawn and garden equipment. Featuring a 25.4mm (1-inch) shaft diameter, a 120.65mm (4.75-inch) pulley diameter, and an overall height of 139.7mm (5.5 inches), this essential component ensures reliable engagement and disengagement of power to mower decks and other attachments. It is a direct replacement for part numbers 71705398 and 91705398, including Warner 5219106, restoring optimal performance and safety to your machine's power take-off system.