By keeping some of these Uriah Products replacement U-bolts on hand, you'll be able to replace existing worn U-bolts on your trailers before they break, saving you the headache of having one break on you when you're on the road. These U-bolts come in a back of two and included the required nuts. They're 5-1/2" long and accommodate 2-3/8" axles. | Uriah Round U-Bolt and Nut | Size 5.5" x 2-3/8"