Completely fake lock, the feeling is that it is a poorly made Chinese product, even though it is supposed to be a Greek company. I bought it supposed for greater security, but I had to throw it away because it didn't work properly with its own keys, as if they were poorly made keys. I almost got locked out of my house. In the end, I installed a Cisa Astral S, a thousand times better, safer, and at first glance, it seems to be a worthy, high-quality, and well-made product.