Different Types of Door Locks

If you are looking for the right door lock to secure your home then here are the different types that you should be aware of:

(Photo from Flickr.com)

1. Deadbolts

   Deadbolts are generally installed on external doors and have a few more options to consider than padlocks. Deadbolts come in three primary varieties: single, double, and lockable thumbturn. Single cylinder deadbolts are found on most American homes. They use a key cylinder on the outside and a thumbturn (rosary) on the inside to open or close the lock. These deadbolts have one primary weakness. If access to the inside is possible (via a nearby window or even through the peephole using simple tools), the door can be opened using the thumbturn. A double cylinder deadbolt uses a key cylinder on the inside and the outside of the door to solve this issue. These have the clear disadvantage of always requiring a key to open the door from the inside if it is locked. This can pose a significant problem in a fire or other emergency situation. If used in a residential situation, it is strongly recommended that a key is left on the inside when people are present to ensure a safe exit in an emergency. Source: Security Snobs

2. Mortise Lock

   • Consists of a flat, rectangular box that fits into a recess in the door from its edge. Also includes two faceplates that include the knobs and keyholes.
   • Available in right- or left-handed styles.
   • Has a pin tumbler locking mechanism in a cylinder.
   • Latch operates from either side except when the outside knob is locked.
   • Deadbolt operates by a turn of the inside knob.
   • A key from the outside operates both the deadbolt and latchbolt.
   • Used on many types of doors, from heavy entrance doors to apartment buildings and residential doors.

   Source: Do It Yourself

3. Rim automatic deadlatch with key-locking handle

These offer extra security at night, allowing homeowners to lock their doors more securely from the inside. Source: Confused