Strong and durable aluminum trusses provide exceptional front-to-rear stability; Aluminum extension beams provide support for longer loads; Rust-proof racking system features a removable rear crossmember with adjustable handles for easy loading and unloading of larger items; Stainless steel fasteners used on all components and accessories for long-wearing durability; PVC insert on rear crossmember for smooth, low-friction loading and unloading of cargo; Includes 4 work winches for securing loads on the rack