This is the only key fingerprint is suitable to me that I could find under 15 internet delivered from LEUROPE! It is ideal for electricians since it contains a triangle EDF size and a circular imprint to open some boxes Schneider Electric. It also has two square footprints of different sizes (9mm and 11mm if I'm not mistaken). Apart from the fact that this technique does not seem key perfectly solid, it is a bit too small and does not always fit into some too deep locks. Nevertheless I recommend this very useful and affordable key!