Ensures easy, smooth loading and unloading of cycles and other cargo. Hardened aluminum top and bottom set is strong, lightweight and rust resistant. Predrilled to speed up mounting to planks. Planks not included. Planks must be drilled, in good condition and smaller in width than ramp top. Top and bottom mount to underside of plank. Capacity: Approximately 700 lbs. (based on use with 2" x 12" fir plank). Complete instructions and mounting hardware included. Ramp Top: One-piece top fits snugly against loading surfacetongue holds ramp on tailgate. Tongue grippers add traction. Tongue is predrilled to allow use of slip-in steel hold-down pins (included) to maximize ramp stability and prevent accidental separation. Ramp Bottom: Angled to ensure no-bump loading. Molded-in ridges on top and bottom sides help prevent ramp from slipping.