Lock (device)

A lock is a mechanical fastening device which may be used on a door, vehicle, or container. Commonly, it can be released by using a key or combination.

Types of lock

• Cylinder lock
• Pin tumbler lock
  • Tubular pin tumbler lock
• Disc tumbler lock
• Combination lock
• Child safety lock
• Warded lock
• Lever tumbler lock

• Kryptonite lock for bicycles.

See also: Lock picking, Locksmith, Physical security