Hey I'm back I recently got a krypto Fahgettaboudit chain and a really sweet cisa monoblock padlock. I wanted to cut the chain down into two pieces so when I lock my bike I wouldn't have too wrap it around my bike more than once. And I wanted to use the excess to lock my front wheel with a abus granit long shackle pad lock.
So I went to my friend Doug (he has an immense collection of power tools) and asked if he could cut it down. He said sure! He wanted to use a torch but I said I would buy the daimond wheel for his air powered grinder. This would be a more better way to test durability.
So we lay the chain on a plywood workbench and start hacking at it with the diamond grinding wheel. This was the most frustrating 20 minutes of my life! The first cut took about 10 minutes, than we put it in a clamp and grabbed the other end of the link with big vice grips and tried to pry it open. Hopeless... So another 10 minutes with the grinder we cut it open bigger so we could seperate the links.
Conclusion Krypto Fahgettaboudit chain is really tough and no crook would spend 20 minutes cutting through the links with power tools to free your bike, it would be more easy to cut the post it is locked too.
Than since I got a superior shrouded padlock for the chain, So We cut the Ny disc lock too that comes with it. This was much faster it took about 4 minutes or so for each side of the shackle.
Conclusion the lock they give you with the chain isn't nearly as good the chain. If your concerned about crooks with power tools get that chain and this lock. Buy a abus granit shrouded pad lock, or the cisa monoblock padlock like I got. Due to the design of the cisa lock the shackle cant be cut and even if you could get tools to it the shank just spins so tools can't grip it.
So there ya have it Krypto Fahgettaboudit chain is almost unbreakable, but the lock isn't, get a better lock too. Oh I found the link to the padlock I would reccomend for that chain.
http://www.lockitt.com/PadlockHighSecurity.htm It's at the bottom of the page. Enjoy!