What the term means
It describes a way of manipulating certain cylinder mechanisms. Not all cylinders share the same design or respond in the same way, so it is unwise to generalise from a demonstration or a product label.
Layered protection
A cylinder with suitable features, a well-fitted escutcheon, a lock in good condition and a sturdy door make a more coherent whole than a single part on its own.
What to ask when comparing cylinders
Ask for the model's documentation, compatibility with the escutcheon and the key copy control system. Ask which features have been tested and do not take terms such as anti-bump as an absolute guarantee.
When to ask for a check-up
It is worth having the entrance assessed if the cylinder is old, sticks out, has play, has been knocked, works erratically or you do not know who still has copies.
Habits matter too
Lock properly, do not leave keys labelled, keep track of copies and deal with any visible damage. Prevention combines product, fitting and use.
