It appears to be quite high-quality, without knowing if it is effective. It has a security key. One disadvantage is its weight, which of course cannot be avoided in this type of lock.
On 20-02-2023: After a few months of use, you realize that many times it gets stuck and the key does not enter the lock. It requires frequent lubrication.

Initially, while the product on Skroutz states that it is in black color, it came in green color. Then I noticed that most stores do not mention the color in the title. Secondly, I received it from the store covered in dust. I haven't had this type of lock before, but it seems okay in terms of construction, now we'll see. It's fine for locking for a short period of time, but in Athens, you can't feel comfortable leaving it for hours anyway. The plus was that it had 4 keys