The Class 4 Safety Chain from Buyers Products is rated to 10,000 or 15,000 lb depending on the model. The chain is zinc-plated to withstand corrosion. Available in a range of sizes and lengths, the chains feature forged slip hook connectors. Use two safety chains with a total holding capacity of at least the total weight of the trailer and its contents. The chains are designed for towing only, not for lifting.