Make your tow vehicle and trailer more secure by keeping them locked up tight with the CURT Hitch Lock and Coupler Lock Set. The CURT Hitch Lock allows you to lock your ball mount into your trailer hitch, deterring theft and preventing anyone from detaching your trailer at the ball mount and towing away your property without your permission. The CURT Hitch Lock in this combo pack features a barbell design and comes with a 5/8" pin diameter to fit a 2" receiver tube opening. Likewise, the coupler lock adds security to your trailer and towing equipment. Instead of merely retaining the coupler latch mechanism, it locks into place and acts as a theft deterrent for your trailer while it is 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". All CURT coupler locks are made to fit latch-type couplers and include two keys. For the ultimate in towing security, a hitch lock and coupler lock used together will provide security at both the vehicle side and trailer side of your towing setup. For your boat, ATV, or camper, CURT locks are designed to keep your toys more secure.• 5/8" hitch lock pin fits 2" receiver tubes• 1/4" coupler lock pin fits up to 2-1/2" coupler span• Locks keyed alike for convenient one-key operation• Protected by a durable chrome-plated finish• Easy-to-operate, 1/4-turn lock activation• Watertight dust caps prevent internal corrosion• Includes four keys for added convenience• Hitch lock measures 5-1/4" long overall• Coupler lock measures 4-7/8" long overall Coupler lock is made to fit latch-type couplers & offers a 2-1/2"" pin span Watertight dust caps prevent internal corrosion Locks are keyed alike & come with 4 keys for convenience | Curt Hitch and Coupler Lock Set, 2" Receiver, 2-1/2" Latch