These accessories are primarily employed to elevate the height of a fifth-wheel trailer coupling, facilitating compatibility with taller pickup trucks. The product commonly comprises a set of durable blocks, typically constructed from high-density polyethylene or similar robust materials, placed between the truck bed and the fifth-wheel hitch. An example would be utilizing such a set when a modern, raised-bed pickup is intended to tow an older fifth-wheel trailer designed for lower bed heights.
The implementation of these products contributes significantly to maintaining adequate clearance between the trailer overhang and the truck bed rails, preventing potential damage during turns or uneven terrain traversal. Historically, makeshift solutions were employed, but the advent of purpose-built sets offers a safer and more reliable method for achieving the necessary height adjustment. This enhances overall towing safety and reduces the risk of costly repairs to both the truck and the trailer.