- 1). Compare security and durability based on standards set forth by The American National Standards Institute (ANSI). (See "Resources" below.)
- 2). Choose between latch bolts, deadbolts or a combination of the two. Locks with dead bolts are a common preference for front door security. Choose a deadbolt lock with at least a one-inch throw (the length that the deadbolt extends out of the door edge). Longer throws are also available.
- 3). Use a lock with a control key. Minimize who can copy the key to your lock by choosing a lock that can only be copied by certain locksmiths. Designed by manufacturers to avert burglars from copying keys at local hardware or retail stores to gain entry to a home, locks with a control key are an ideal way to prevent unauthorized keys from being duplicated and redistributed. Manufacturers maintain records of each key duplication that is made.
- 4). Decide if you require a lock with additional reinforcement. Choose a lock with a high security strike plate; many of which are available with a heavy gauge metal reinforcing plate. Three-inch screws are used to secure the strike to the wall framing as well as the doorframe jamb.
- 5). Decide if you require an anti-drill feature, which prevents thieves from drilling out the lock, or hardened cased steel, which provides a more resilient case and guards against blows from a sharp blunt object such as a hammer.