Hopkins Manufacturing Corporation makes your towing experience simpler and more rewarding through innovation and value. As an Endurance product by Hopkins, this product is designed for ultimate durability against harsh weather conditions, corrosion, and normal wear and tear. Hopkins offers a variety of towing solutions including vehicle wiring kits, adapters, vehicle and trailer connectors, breakaway systems, and much more. Today, more than 40 percentage of retail category sales are generated from Hopkins innovations. The struggle for disconnecting 4 flats is finally over. With Hopkins' Endurance 12" Easy-Pull 4 Flat Trailer Side, a finger loop provides advanced ergonomics and makes connecting and disconnecting a breeze..