My hubby bought this security lock for our new house on knowing that I'm going to stay in our new house for a week now. Our new house is located in a real estate, and though we've got security guards in this real estate, their post is located far from our house, so my hubby is worried about my safety. He bought some of these security locks, Xander Security Lock, size 50mm (wide) Long Shackle. The motto of this lock, as written in the packaging, is "Lock and Secure Your Important Places". This lock is made in Germany (or at least it says that it has Germany Standard) and has passed ISO 9001:2000 (system certification). It comes with a pair of keys, one for the main key, the other is for the spare key. My hubby deliberately chose the long shackle because it would be much more flexible to use it on almost everywhere. Even our motorcycle can also be locked with this by the tire. The shackle is made from hardened steel, and other features include dual-locking levers and precision pin tumbler mechanism. It's perfect for locking the gate, doors, and cabinets. It looks pretty strong and solid, and so far it works great. I find no difficulty with the unlocking or locking. Overall, I'm satisfied with the work of this lock, and thanks to it that I feel a lot safer in my own house.