The powerful 80-2 die set is used to cut 80-2 double strand roller chain and works with Smith Craft's EZ Breaker manual roller chain breaker base, sold separately. The original EZ Breaker was designed to cut chains up to 80H. Due to customer requests, we have designed die sets for chains wider than 80H; some of these chains are too wide for the EZ Breaker to push the link completely out of the chain.