Locksmithing

mechanical or electronic fastening device

thumb|Three keys on a keyring with a promotional message A keychain () (also key chain or keyring) is a small ring or chain of metal to which several keys, or fobs can be attached. The terms keyring and keychain are often used interchangeably to mean both the individual ring, or a combined unit of a ring and fob.

thumb|Different types of shackles. The yellow cable ties indicate the date of the last tool inspection. thumb|A well-used shackle.

practice of unlocking a lock without the original key

thumb|A diagram of a door, with the jambs labeled.

thumb|right|200px|An illustration of a German locksmith, 1451. Locksmithing is the work of creating and bypassing locks. Locksmithing is a traditional trade and in many countries requires completion of an apprenticeship. The level of formal education legally required varies by country, ranging from no formal education to a training certificate awarded by an employer, or a full diploma from an engineering college, along with time spent as an apprentice.

type of locking device in which a sequence of symbols, usually numbers, is used to open the lock

key used to open and/or start an automobile

key designed to operate multiple locks

lock picking technique for opening a pin tumbler lock

REDIRECT Lock and key#Keyhole

process of manufacturing a key based on an existing key

locking mechanism designed to open a safe or vault only after reaching a preset time, commonly found in bank vaults or other high-security containers

key that has been filed or cut to create a master that can be used to unlock a variety of warded locks

equipment used for home repair and other work in the home

lock operated by a keycard

Type of door key

key-operated switch

Finnish lock design

right|thumb|Door with two locks, one in the doorknob and a separate deadbolt A deadbolt or deadlock is a type of lock morticed into a wooden door where a bolt is thrown into the door frame, using a key from either side, to secure the door. It is distinct from a spring bolt lock because a deadbolt can only be opened by a key or handle. The more common spring bolt lock uses a spring to hold the bolt in place, allowing retraction by applying force to the bolt itself. A deadbolt can therefore make a door more resistant to entry without the correct key, as well as make the door more resistant to fo

mechanical fastening device