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 40 ft. Winch Strap is constructed with a bright fluorescent yellow polyester webbing that keeps its shape and durability in all weather conditions and applications. Additional Features: 4 in. Hi-Test webbing is light and compact, absorbs shock, and is UV, corrosion, and abrasion-resistant. Rated Capacities: Ideal for cargo on truck, trailer or flat beds. Rated for 5,000 lbs. working load limit. Disclaimer: Before use, always be sure to confirm the size of the cargo before using this winch strap.