The CURT Coupler Lock is designed to add security to your trailer and towing equipment. Instead of merely retaining the coupler latch mechanism, it locks it into place and greatly deters any tampering and theft of your trailer while it's coupled to your vehicle. The CURT Coupler Lock is key-operated and comes with two keys for added convenience. This coupler lock features a right-angle barbell design to keep the pin well protected from tampering. It comes with a chrome finish and blue anodized aluminum head for rust resistance. Offers an adjustable pin span from 1" to 3" with a pin diameter of 1/4". Made to fit latch-type couplers.• 1/4" pin allows adjustment to fit 1" to 3" coupler span• Right-angle design with swivel head for easier access• Chrome-plated with anodized aluminum head for lasting rust resistance• Easy-to-operate, 1/4-turn lock activation• Watertight dust cap prevents internal corrosion• Includes two keys for added convenience Chrome-plated with anodized aluminum head for rust resistance 1/4"" pin adjusts to fit 1"" to 3"" coupler span Includes two keys for convenience | Curt Coupler Lock, 1/4" Pin, 1"-3" Latch Span in Blue