It is usual as a key. It is very convenient to set the 4 digit dial to any number and to make it easy to memorize. It bends well for thickness and is easy to use. However, although the spec is 12 mm in thickness, the thickness of the wire inside is about 7 mm. I thought that the crime prevention effect seemed to be higher because I used a thickness of 10 mm separately, but the wire in the other company was 9 mm. It is disappointing to know that it is making the thickness by the thickness of the resin covering the metal wire.