Ensure easy, smooth loading and unloading of cycles and other cargo. Hardened aluminum tops and bottoms are 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. Standard tops and bottoms mount to underside of planks. Deluxe tops and bottoms mount to top and underside of plank for maximum strength and stability. Capacity: Approximately 1,400 lbs. per pair or 700 lbs. each (based on use with 2-ft. x 8-ft. or 2-ft. x 12-ft. fir planks). Complete instructions and mounting hardware included.