Outfit your semi to be Ready for the Road Ahead™ with a smooth and reliable spring-operated door assembly with the Whiting 2.5" Steel Roll Up Door Heavy Duty Top Slide Bracket. This top slide bracket ensures your roll-up door can open and close with ease, without locking or jamming in place. It is constructed with rust and corrosion-resistant metals for extended use in harsh conditions and humid climates. FleetPride is your First Click in Heavy Duty®.