1 Star Euro Cylinder lock with Thumb Turn approved to British Standard TS007:2014 and Police Secure by Design. This replacement euro cylinder features Anti-pick, Anti-Screw, Anti-Pull, Anti-Bump, and Anti-Drill components designed to resist most criminal attack methods on door lock cylinders. It is supplied with 3 Standard Yale keys; additional replacement keys can be ordered from a locksmith. This is the easiest way to immediately upgrade security at your property, as the euro cylinder can be replaced in a few minutes. The thumbturn is used inside the property for convenient locking without the key. Recommended for use in flats or apartments that have a single fire escape door and need an exit without the key.