The unique under bed mounting system leaves truck box free of bedrails. The bed hole plugs are included. This is for long box applications only. They have a 21,000 pounds towing capacity with a double pivot head with polyurethane bumpers help eliminate side to side movement when uncoupled and cushion pivot action when coupled. Powder-coated finish helps these hitches look great for a longer time with a quick and easy installation. The mounting kits are available for most full size trucks. These are made in the USA and have a 5 year manufacturer warranty.