The Tommy lock, Fisher Miniute Mount 2 Plow lock, is made of 3/16 steel plate and angle iron and it's welded on all seams. wt. is 3lb .5 oz. the steel is primed and painted. Made in The U S A The lock is 5/8 stainless steel and has no neck down which is a weak spot on other locks, seals are on both ends of the lock to keep water out.
This stainless pin is more expensive but you would not want to skimp on this part the key is side cut design