Fits Most Class 8 Over the Road Trucks and Trailers and Some Medium Duty Trucks. Use the tapered driver side for bearing races and the flat side for seals. Includes six drivers and handle extension for driving bearing races and seals on hubs with deep brake drums without removing the drums. Driver sizes: 3-43/64\", 4-7/8\", 4-13/16\", 5-1/2\", 5-25/32\", and 6\". Made from aluminum. 61910 4-7/8\" Bearing Driver 61920 4-13/16\" Bearing Driver 61930 5-1/2\" Bearing Driver 61940 5-25/32\" Bearing Driver 61950 6\" Bearing Driver 61960 3-43/64\" Bearing Driver 61970 Plastic Case for 61900 59520 Nut 59530 Extension 59540 Handle 12830 Washer