Boss Snow Plow Lock by TheTommyLock

The Tommy lock, Boss Snow 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   

Very unique and secure lock desing