Lock picking is the practice of unlocking a lock by manipulating the components of the lock device without the original key.
A set of lock picks and tension wrenches for pin/tumbler locks
Picking while tensioning
A common set of skeleton keys used to open most types of warded padlocks
A traditional pick set. From left to right: torsion wrench, "twist-flex" torsion wrench, offset diamond pick, ball pick, half-diamond pick, short hook, medium hook, saw (or "L") rake, snake (or "C") rake.
A lock is a mechanical or electronic fastening device that is released by a physical object, by supplying secret information, by a combination thereof, or it may only be able to be opened from one side, such as a door chain.
A typical modern padlock and its keys
Bronze lock in a form of scorpion from Nalanda, India, 10th century.
Medieval Gothic lock, from the 15th–16th centuries, made of iron, in the Metropolitan Museum of Art (New York City)
Drunk man's lock at the bottom (black lock) and a regular modern lock at the top