Be prepared for the rougher heavy-duty cargo tie-down jobs with ancra's extremely durable and extremely strong 4 in x 30 ft x-treme webbing winch strap with flat hook. the 4 in proprietary treated polyester x-treme webbing offers twice the abrasion resistance and higher moisture resistance than the standard strap, making it ideal for the tougher tie-down jobs. our strap's flat hook is designed to be genuinely flat so that it can easily slide into your vehicle's side rail effortlessly. to help prevent the winch strap's webbing from wearing down to the thread, we've equipped our steel powder-coated flat hook with an aluminum edge guard in the webbing slot. this guard is a round piece of metal that acts as a shield, preventing the hook and the webbing from constantly rubbing against each other. ancra's 4 in x 30 ft x-treme webbing winch strap with flat hook is engineered to meet or exceed wstda t-1 recommended standard specifications.