Features Worm Gear Part: A replacement part manufactured for snow throwers. This special worm gear drives the auger shaft and has a key slot in the arbour to fit onto the output shaft using a half round key. Broad Matching: For Bolens, for Columbia, for Craftsman, for Gold, for Huskee, for MTD, for MTD Gold, for MTD Pro, for Private Label, for Ranch King, for Ryobi, for Troy Bilt, for Yard Machines and so on. Practical Uses: Replacement for 717‑0528A, 717‑0528, 917‑0528A, 717‑04449, etc., and can be widely applied to 24710568, 24742513, 24788190, 24788347, 24788690, 24788691, 24788771, 24788791 and more. Brass Material: Adopting high quality brass material with 1-7/8in outer diameter, not easy to deform and very durable for long term using. Easy to Install: Comes with a compact size and a light weight as well, the convenient installation can be quickly completed in minutes. Specification: Item Type: Worm Gear Material: Brass Replacement: 717-0528A, 717-0528, 917-0528A, 717-04449, 717-04861, 917-0528, 917-04861, 917-04861-A Fit Model: 24710568, 24742513, 24788190, 24788347, 24788690, 24788691, 24788771, 24788791, 24788830, 24788890, 24788955, 24788957, 24788970, 24788999, 247881900, 247883700, 247885500, 247885570, 247885680, 247886640, 247887001, 247887900, 247888301, 247888500, 247888301, 247888500, 247887900G Package List:1 x Worm Gear Note:Make sure the new replacement part number matches. Package List 1 x Worm Gear