As your work and hobbies change, so can Ursa. One look at the Ursa system and accessories will show you how Ursa grows with your needs. Ursa accessories are engineered specifically for the Ursa's unique design. So you know your Ursa will continue to perform with single-handed ease, even as you discover new ways to use it. Clevis Hitch Quickly (without tools) connects any Ursa Wagon frame or Cargo Sled to a lawn tractor or all-terrain vehicle (ATV). The Clevis Hitch can be left in handle with the foam grip so that it's always ready when you are. Trailering Arm This zinc-plated steel 18" arm shortens the standard arm for a tighter towing distance. Includes a standard 1/2" hitch pin that fits most applications. Chocks Heavy-duty yet lightweight chocks stabilize the Ursa Wagon wheels and are especially useful when working with heavy loads or on uneven terrain. Sold in pairs.