Ankle restraint chains for milking cows the chain prevents the cows from kicking during milking the chain is galvanised 69 cm including ring and hook application at the back of the cow a tendon can be seen at the back of the knee in order to secure the hind legs the clamps should be attached there the chain is moved past the udder and the second clamp is attached to the other hind tendon the chain can be tightened using the adjusting ring