ABUS Granit 37/80 Heavy Duty Hardened Steel Padlock - 1/2" Closed Shackle Security Lock - Weatherproof & Corrosion Resistant for Outdoor Use - German Made Keyed Different - Ideal for Gates, Storage Units & Construction Sites

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.