These Ignition keys are compatible with most snow blowers with Tecumseh engine Snow Blowers. If your model number is not on the list, please send us a message and we will let you know if it will work for you. Fits Ariens models ST524, ST724, ST824, ST1024, ST1028, ST1128, ST1332 and ST1336, MTD 314-180-000, 314-180-088, 314-180-131, 314-181-000, TMO-3525203 snowblowers with Tecumseh engines AH600, H, HM, HMSK, HS, HSK, HSSK, LH, OH, OHSK. Also Compatible with some Craftsman, Cub Cadet, Huskee, Lawn Boy Montgomery Wards, Poulan, Toro and Yard Machine Models. Replaces part numbers Ariens 07500108, 07532000, 7500108, 7532000 MTD 402255, 725-1660, OEM-425-1660 Tecumseh 35062 Stens 430-492. Parts 4 Outdoor parts are manufactured and shipped in the USA. We have a no hassle return policy. If you find that our product does not meet your expectations, you can return for a full refund within 30 days with no charge to you.