So today I finally received my Avenir chain breaker. I tried it out on the chain I was hoping to take off, and the chain wouldn't fit. So I see if it would fit on my single speed chain. No dice. No luck with my 8 speed Giant Brass 1 either. How the heck can I break a chain with this thing? It appears that those stupid metal pieces between the top and the bottom of it get in the way of the chain. Please help. I ended up having to hack-saw that chain off of the bike.