Does the tailgate on your 1958-1972 Chevrolet or GMC Fleetside rattle around? Does it feel like it hangs up or squeals while opening or closing it? The factory design is a metal hinge with a metal tailgate. This constant contact will wear down the hinges and cause them to rust, squeak, and get sloppy. Urethane hinges for stepsides have been around for years so BROTHERS set out to fix this issue for the 1958-72 Fleetside trucks. We settled on a high quality CNC machine Delrin (Urethane) ring around a solid zinc core. This allows for an easy, bolt-in installation just like the factory unit... but BETTER. No need to lubricate your old hinges anymore with BROTHERS EXCLUSIVE design. Sold in pairs.