The New Mule Litter Wheel uses a strong and durable ratchet-locking device to secure any type and style of rigid litter, even a makeshift litter made from wodden planks or logs. Single-wheel design provide easy movement over rough, narrow terrain giving giving your patient the smoothest possible ride. The two securing straps (2 hooks per strap) are each rated to 4.5 Kn (1000 lbs).