"Bridge the gap between the edge of your loading area and semi-trailers or trucks with a 78"" W Guardian Edge of Dock Leveler. Less hassle than a dock board, this leveler has a weight capacity of 20,000 lbs. and installs directly to your loading dock for quick and easy operation when trucks back up to your dock. The spring-assisted leveler requires no more than 34 lbs. of torque to lift and set the leveler into position, which allows it to span up to 27.75"" from dock to truck. It has a working range of 5"" below or above your dock height, and is manufactured in steel for durability. This edge of dock leveler is designed to service conventional trailers, and comes with two bumpers on either side as a buffer. It complies with O.S.H.A. safety standards and is made right here in the USA."