The CURT 5th Wheel Lock is made specifically for 5th wheel trailers. It easily slips over a 5th wheel trailer's kingpin and ensures that the trailer cannot be towed away without your permission. Its universal design is able to fit most 5th wheel trailers on the market today. The CURT Kingpin Lock is made of strong aluminum and is key-operated.• Locks onto 5th wheel kingpin to deter theft of 5th wheel trailer• Universal design fits most 5th wheel trailer kingpins• Built with a strong aluminum body for reliable security• Two keys included for added convenience• Protected with a strong chrome-plated and powder-coated aluminum finish• Fits 2" diameter kingpin• 3-5/8" long overall Made of strong aluminum with chrome-plated & powder-coated finish Two keys included for convenience | Curt 5th Wheel Kingpin Lock