It can be divided into two.
The lower part of the Fore Hock is called Prime Hock. It will weigh about 1 1/3 pounds (600g), and should be braised.
The upper part is called the Hock Knuckle. It has lots of bone in it, and weighs about 3 1/3 pounds (1.5 kg..) It can be boned, rolled and called a picnic ham (UK), or meat can be removed from the bones and used in chunks in dishes, etc.