For easy and fast assembly and disassembly, requiring only two screws and two pins, and are very rigid and lightweight. UV-resistant yellow plastic pads support the hull. A plastic hook secures the bow of the boat when going up or down on the ramp, keeping your Opti in place. Structural joints are made from aluminum (not plastic, as used in competitors product) and epoxy paintedStainless steel axles, screws, cotter pins and lock nuts Rubber supports are made to last with UV and saltwater protection Polyurethane foam wheels will never go flat and are puncture-proof