ABUSGranit 37/80 Heavy Duty Hardened Steel Padlock - Closed Shackle Lock with 1/2" Shackle - Corrosion Resistant Outdoor Lock - Made in Germany - Keyed Different

This is an outrageous lock. Heavy and durable. It's got a great reputation out there, as the price would indicate. It is limited in that you can't put it through 2 chain links (if you can you wasted your money getting a crappy chain to pair with a great lock). So make sure that you get a chain where the links can go through other links. II did a lot of research into locks and chains after having my motorcycle stolen, and this lock was the one that kept popping up. I now have 2 of these combined with 2 Pragmasis boron steel chains. Having 2 locks and 12 feet of chain may sound crazy, but it's flexible to lock around anything and having 2 locks means if I can't open one then I have a second option to unlock (it's happened to me). This is an expensive lock, but it's makes for a good defense against thieves.Update after 9 years of ownership: I still use 2 of these to lock up a motorcycle on the streets of NY. That's about $14 a year, so far. The design of these locks is awesome. They lay on the ground, sometimes in the dirt when lock, and that means tons of dirt enter from rain. On the worst occasion I might have to jiggle they key to get the dirt out, and just recently the worst case required a couple cycles of hot water and compressed air to clean, but it's back in order. I had it freeze up in extremely cold weather (laying in snow and ice), and less than a minute with my cigar lighter resolves that. So, not only well-built and strong, it is also durable and long lasting, making it an economical purchse.

Amazing super solid and cool looking lock. Just make sure to check the shackle diameter. It is beefy.

I ordered this lock used off of Amazon recently. I was in need of a higher security lock that could not be picked with the ease of a Master lock. The lock and all related items arrived in flawless condition. It comes with a card with the code to make new keys and two keys, one with an LED light on it. I was pretty skeptical about the light- usually they are pretty cheap affairs that only work for a little while. This key is very well thought out- the battery and LED can both be easily replaced if needed. Now on to the lock. "Granit" is a good name for it. Abus rigorously tests their locks according to the CEN standards and this lock rated CEN 5 on a scale where CEN 6 is as high as possible. Abus guarantees this lock to last 40 years in a marine environment as long as it is maintained every once in a while. This sucker is probably going to outlive me. The lock is substantially large and it looks like you could use it (and some creative lock placement) to keep somebody from stealing your Panzer it you had to park it in a bad neighborhood for an extended period of time.The lock was not as heavy as I was expecting, and the build quality is top-notch. It is very easy lock and unlock. Unlike many locks, both sides of the shackle come out when you open it. This little feature actually makes it far easier to put the lock on and take it off- you do not have a couple of pounds of steel awkwardly swinging around as you try to take it off and put it on. Slap the U-shackle through your chain or hasp, slide the lock body over it, turn the key 180 degrees and off you go. It is an operation that can easily be completed with one hand due to how well the parts fit together. The steel gate this lock is closing is probably now the the weakest point in the physical security that keeps people from bothering me or breaking in. In fact, if anybody does manage to get in by breaching this lock I will probably be more impressed than angry. I will be buying more of these in the future as needed.

This lock is a BEAST! I purchased the lock and matching Abus chain as I have moved to a higher crime city. I have a $2K bike that I don’t want to lose and needed something to protect my investment. The lock is bombproof but very, very heavy. I wish I would have gotten the next smaller size Abus lock as it would still have done the job but saved a lot of weight (I’m also including the chain). When I can afford to I will get the next size down but will still hang onto this one and use it in another application. Be sure to keep in mind that the shackle on this lock is very thick and WILL NOT fit most storage units. Other than that this lock will be handed down through the generations as well as the inevitable nuclear holocaust..

While this lock is extremely secure, sturdy, and well-made, we haven't been able to find a use for it. We bought it to use on a storage locker; however, the hasp is so small (to keep from being cut with bolt cutters) that it won't actually fit on a storage locker. We weren't able to use it to secure a load on a rental truck either for the same issue with a small hasp. So...keep this in mind when you are deciding what you plan on locking with this sturdy, secure, incredibly-made lock. If we hadn't thrown away the packaging, we probably would return it. We spent over $100 with tax, and ended up with a lock under $20 at Home Depot at the last minute when we went to lock the storage locker.