This straight tongue coulper by Demco is made from heavy duty steel and is zinc plated for a corrosion resistance. Demco couplers feature their Ez latch system for easily securing the coupler to the 2 inch truck towing ball. If you have a 3 inch wide trailer tongue, this is ideal for your trailer application. This product is typically used in heavy duty marine applications on trailers with Electric Over Hydraulic Brakes, and needing a capacity up to 10,000 lb. This bolt on channel coupler mounts to your 3 inch wide trailer tongue with 2 or 3 trailer bolts. The 1/2" Diameter trailer bolts are the ideal size.