Today deadbolts are the most secured and safest locks recommended by police departments for high end security. Deadbolt uses a special kind of locking mechanism and cannot be opened except by rotating the lock cylinder.
Cylinder act as a barrier between pins and picks and restrict its movement and rotation without a correct key. There are different types of Deadbolts available in the market. Single Spring and Double Spring with different features and qualities are the most popular types and can be easily used with any types of doors.