Final answer:
Buck's skin traction is a type of external fixation used for lower limb fractures. It is applied to the skin, not directly to the fractured bone, and the weights should hang freely off the bed.
Step-by-step explanation:
Buck's skin traction is a type of external fixation used to immobilize and align fractured bones. The traction is applied to the skin through straps or braces, not directly to the fractured bone. Buck's traction is commonly used for lower limb fractures, such as fractures of the femur. The weights in Buck's traction should hang freely off the bed to provide a constant and controlled pulling force on the fractured bone.