Working Load Limit (WLL) is the max cargo weight Tie-Down can safely handle and accommodate forces caused by speed, road conditions, or emergencies; Industry standard for WLL is 1/3 the Break Strength. Quality and Durability: Keeper 8 ft. Mountable Rack-Ratchet is the perfect tie-down to keep cargo loads safe and secured; This rack-ratchet comes rated with a 500 lbs. working load limit. Keep Your Cargo Safe: Abrasion-resistant 1.5 in. Hi-Test webbing helps absorb shock during transportation. Construction: Rack-ratchet is constructed with a durable metal with an open molded handle, and vinyl-coated double J hooks to prevent scratching and marring; This rack-ratchet is compatible with both square and round frame racks. Usage: Secure small to mid-size loads by attaching the hook to an anchor point or loop around to affix with D-ring; Ideal for securing ladders, pipe racks, and more.