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. This CURT hitch lock features a barbell design and comes with a 5/8" pin diameter to fit a 2" or 2-1/2" receiver tube size. The CURT barbell hitch lock is comprised of a pin with two end caps and a round locking mechanism. It's key-operated and activated with a simple 1/4-turn. A watertight dust cap is included to keep out the elements and prevent corrosion.• 5/8" diameter pin fits 2" or 2-1/2" receiver tubes• Protected by a durable chrome-plated finish• Easy-to-operate, 1/4-turn lock activation• Watertight dust cap prevents internal corrosion• Includes two keys for added convenience Barbell design with pin, two end caps, & a round locking mechanism Key-operated with easy 1/4-turn lock activation Includes watertight dust cap & two keys for convenience | Curt 5/8" Barbell Hitch Lock