Locks and cylinders

Need to replace your armoured door’s lock, or want to work out which is the most secure? European cylinder, double-bit, defender: behind these names lie real differences in security.

In this archive you’ll find everything about armoured door locks: how the European cylinder works and which is the best, what the defender that protects the cylinder is for, the differences with the double-bit lock and how the electric lock works.

We explain every component in plain words, so you understand what really protects your door and what’s worth choosing or replacing.