The Evva EPS Kitemarked TS 007 3* Rated cylinders offer the best protection available. They have a high resistance to bumping, snapping, picking and drilling and have been tested to EN 1634-1 meaning that they have been tested on a fire resistant steel door and are rated to 90 minutes fire and smoke resistance. They are supplied with 2 keys.
EPS 3Star cylinders are intended to 'snap' in such a way that the burglar is prevented from unlocking the door even after the lock is snapped. See the video below: