Why Ultion is 3 Star Plus more protection
3 * plus more
Digital door locks are available in both mechanical and electronic versions. Note though, that very few of these types of lock are intended to be the sole method of security on an external door as these locks are intended to offer a degree of access control only - which means literally to control access at certain times of the day - not protect the building against forced entry when uoccupied. Usually, it would be recomended that a security lock such as a 5 lever mortice deadlock made to the relevant british standard of the time be fitted on the door and this lock would be used when the building was unoccupied.