Expand your bed cap's cargo potential with a versatile crossbar system that creates additional mounting space for gear, equipment, and adventure-ready accessories. Constructed from durable, corrosion-resistant materials, these heavy-duty crossbars are engineered to withstand harsh weather, demanding job sites, and rugged off-road conditions with a 600 lb static load rating and 300 lb dynamic load rating. The integrated 5/16-inch T-slot channel and 3.25-inch raised profile deliver a clean, low-profile appearance while providing a secure mounting platform for cargo baskets, bike racks, kayak carriers, rooftop tents, and other T-slot-compatible accessories. Designed exclusively for Rough Country bed caps, the 42-inch crossbars fit T-slot rail systems with mounting widths from 29.75 inches to 42.75 inches and install easily with no cutting or drilling required.