Our 2019+ GMC/Chevy 1500 Bed Channel Stiffeners reinforce the weak truck bed channels against cracking and other damage. Heavy loads, camper shells, bed racks, or off-road stresses can crack the bed channels over time. These brackets provide the needed extra support and rigidity to avoid this common problem. Our brackets add an extra 3/8-inches of steel, composed of a 3/16-inch stiffener and a 3/16-inch backer plate. Each bracket features accessory mounting locations that are perfectly suited for antennas or flag mounting. Additional tie down points are also included in the design. Our stiffeners are finished in a durable hammer black powder coat, and as always, are Made in America. * Please Note: This is not compatible with the Carbon Pro Bed. ** Please Note: Installation requires drilling and riv nuts.