FJM Security SPSA-60 High Security Padlock

I use this with a 3 foot length of ABUS chain for when I need to really secure my bike outdoors. It's very easy to operate and appears to be quality. The keys are nice too.

EXELENTE seguridad

UPDATE: We have 12 of the Sobo SPSA-80 (the bigger brother to this lock) for about 18 months now. Of the 12 we purchased. 3 have problems. 2 of them are "stiff" (turning the key) but still working. But a third one has failed. The key binds against something. It'll turn to unlock, but is very, very hard to turn back to get the key out. There is definitely something binding on the inside. This lock has been used indoors only, so it's unlikely any foreign matter found its way into the keyway. So we have a 8% failure rate and a 25% problem rate. Also the manufacturer has refused to repair/replace the lock because they say it's past the warranty period, but they have refused to say what that warranty period is. (When I bought them I thought I remembered 5 years or lifetime, but I have not found my original packaging.) Certainly the manufacturer should know and disclose it.