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Pin tumbler locks are popular because they are relatively secure for most residential applications and generally inexpensive. Since the entire locking mechanism in this device is contained in a single cylinder, pin tumbler locks are also very easy to swap in and out. Most exterior doors on homes and apartment buildings will have at least one of each of these locks. Knob locks are quick to open and can be convenient when minimal security is acceptable, but they are very easily forced open....Read More
The locksmith we called last week to replace all the locks on our home after a break-in said the most common type was a deadbolt and knob lock followed by lever handle locks. ...Read More
My home has a single-cylinder deadlock with a thumb-turn on the inside. It's the most common type of lock in the U.S. I once owned an apartment that had a jimmy-proof deadbolt. It's the most common lock for apartments.
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