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 features a barbell design to keep the pin well protected from tampering. It comes with a chrome finish and offers a pin span of 2-1/2" with a pin diameter of 1/4". All CURT coupler locks are made to fit latch-type couplers and include two keys. Protect your boat, your camper, and even your utility trailer the right way with a CURT coupler lock.• 1/4" pin fits latch-type couplers with a max span of 2-1/2"• Easy-to-operate, 1/4-turn lock activation• Watertight dust cap prevents internal corrosion• Protected by a durable chrome-plated finish• Includes two keys for added convenience• 4-7/8" long overall 1/4"" pin fits latch-type couplers with a max span of 2-1/2"" Watertight dust cap prevents internal corrosion Comes with two keys for added convenience | Curt Coupler Lock, 1/4" Pin, 2-1/2" Latch Span