Fits the Most Popular Sizes for Class 7 and Class 8 Over the Road Trucks and Trailers and Some Medium Duty Trucks. The drivers are designed to hold the seals to make installation easier. Includes five drivers and handle extension for extra reach for driving seals on hubs with deep brake drums without removing the drums. Driver Sizes: 4-13/16\", 5/16\", 31/32\", 11/16\", 6\" 61700 4-13/16\" Seal Driver 61710 6-5/16\" Seal Driver 61720 5-31/32\" Seal Driver 61730 5-11/16\" Seal Driver 61740 6\" Seal Driver 61990 Case for 61850 59520 Nut 59530 Extension 59540 Handle 12830 Washer