The Kelley aFX-S dock leveler provides the same proven air-powered performance, design features and warranty as the aFX®, but also incorporates a 5″ high, full-width, constant structural steel barrier, capable of withstanding a 10,000 lb. load at 4 mph. Get 100% full-time safety at dock level, as well as below-dock end-load situations, and prevent accidental forklift runoff.