The Homecraft Bed Rail fits neatly under your mattress. It is designed to help prevent the user from rolling out of bed. To install, have the user lay in bed and once in simply slide the rail under the bottom of the mattress or enter the bed at the lower end with the bed rail already in place. The weight of the user secures the bed rail in place. Made from high strength epoxy coated steel, the Homecraft Bed Rail will add that added safety when sleeping.