Fitment: Fit For the Most Popular Sizes for Class 7 and Class 8 Over the Road Trucks and Trailers and Some Medium Duty Trucks. Features: 1) Specially designed to hold the seals for easier installation. Allows driving seals on hubs with deep brake drums without removing the drums. Reduce damage to other auto parts during maintenance. 2) These tools arrives milled from super-tough aluminum alloy. It has the capability of handling literally tons of pressure. CNC process precision manufacturing??sturdy and durable, impact-resistant, corrosion-resistant and wear-resistant for a long-term and reliable performance. 3) Install the driver on the appropriate handle, then use the attached hardened washer betw.