This lock ticks all the boxes for me. I wanted the convenience of having a thumb turn on the inside rather than having to use a key. I wanted something that had the BS kite mark and offered high security. Being brass it matched the metal that made up the rest of the 'lock'. It was really easy to fit, and I say that as someone who is not a DIY person! I fitted this lock some weeks ago and it has been performing trouble free. I am very pleased with this lock, and very happy with the company, "Safe", that supplied it.