This is an original 1928-31 Model A Ford Starter Bendix Drive. Pretty good condition, some normal wear-see photos. Diameter of shaft hole is approx 5/8". Ford book shows this Fits all '28-31 Model A's including AA Truck; all '32-48 Ford passenger cars (except 60 hp engine and '41-42 four cyl); all '32-47 Ford Pickup and Trucks including COE (except 60 hp and '41-42 four cylinder); all '39-48 Mercury passenger cars and all '36-47 Lincoln V-12 (may also fit earlier Lincoln years, but not sure as my book starts in 1936). Please check my other auctions.