Bored locksets are part of the basic door hardware that includes the locking mechanism built into the doorknob and latch. They are classified as entry locksets for the front and back doors, passage locks for the closets or hall and privacy locksets for the bathroom and bedroom.
A quality entry lockset has a deadlatch in the rear of the latch. A regular latch is angled to the outside of the door, which makes it easier for an intruder to fit a piece of stiff material between the door and the frame; the deadlatch would prevent this from happening if installed correctly it will angle into the door.
Bathroom and bedroom locks are not for security but rather privacy. Therefore they operate by a push button on the inside but no locking device on the outside.
Cylinder locks have a pin tumbler locking mechanism in a cylinder. They are most often used in new installations and as replacements because they are mortised into the frame of the door. Because of the wide range of use they can be installed on heavy entrance doors, apartment buildings and homes with a recommended pin number for the type of door.
There are several mechanical types of key operated locks available for purchase by the do-it-yourselfer. Pin tumbler locks with five or more pins offer greater resistance to picking. Depending on the number of pins, this lock would be able to accommodate to key changes. Five or more pins are the safest but these locks can be made with as few as three pins. Pin-type mechanisms can be found in use for padlocks, deadbolts, cabinet locks and locksets.
Warded locks are a low cost alternative but do not provide a strong security. They offer superior weather resistance because of the lack of rotating internal parts and their simple construction.
Combination locks offer good security and a wide price range to appeal to all do-it-yourselfers. They are available in models for simple bike locks, locksets and heavy-duty use.