What is a barrel key?

A barrel key is a type of key used primarily in locks that have a cylindrical, barrel-shaped mechanism. It features a unique cut pattern that corresponds to the internal pins or tumblers of the lock, allowing it to turn and engage the locking mechanism. Barrel keys are often associated with older types of locks, such as those found in furniture or vintage safes, and are less common in modern locking systems. Their design provides a level of security, as each key's specific cut pattern makes it difficult to duplicate.