The Premier 45 Ton 6-Bolt Mounting Slack Reducing Coupling Kit is the perfect choice for heavy duty towing applications. This kit is precision engineered to provide excellent fit and top performance, while also preventing corrosion and providing long lasting performance even in difficult circumstances. The kit enhances the towing system's functionality by making towing easier and more effective. This coupling kit also reduces slack and vibration in the towing system, providing a smoother ride and improved safety. FleetPride is your First Click in Heavy Duty®.