For easy and fast assembly and disassembly, requiring only three screws and two pins, and are very rigid and lightweight. Square anodized aluminum tubing with rounded edges prevents scratches on the hull.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 salt water protection High-strength polyester adjustable strap Polyurethane foam wheels will never go flat and are puncture-proof