Keyed Alike Lock Set with Patented Barbell Heads - Use this locking hitch pin set with your Rapid Hitch adjustable ball mount. It comes with a T3 receiver lock that fits standard 2 inch receivers and a T4 lock for use on the ball mount. They are Keyed Alike and made of a machine hardened steel with a chrome finish. With their exclusive internal O-ring and end cap to help seal out dirt and corrosion they will give you years of trouble free use. They also have a high quality tubular key that will not bend or break and the rugged lock can not pop open or be false locked. Chrome finish. Lifetime Manufacture Warranty.