Specific Types of Lock

A lot of people are not aware of some specific types of locks that locksmiths can offer to suit certain situations; in this blog I have explained some of the specific types of lock that can be provided by your local reputable locksmith.


Most locks are keyed to differ which means you need a different key for each lock. Keyed alike means you can have any number of locks that open with a single key. This could include a combination of euro cylinders, rim cylinders (often referred to as Yale cylinders), screw in cylinders and/or padlocks. This option can reduce a huge bunch of keys to just 1 key that fits all.


Master keying basically gives different keys different levels of access. The best way to describe this is to think of a hotel with 5 floors; The cleaner for each floor only requires access to rooms on that floor but no other floor. The cleaning supervisors key will access all rooms on all floors but not the offices. The managers key will open all offices and all rooms on all floors.


These types of locks have keys that cannot legally be copied by local key cutters etc, particularly useful for landlords, clubs, bed & breakfast etc when you hand a key to someone they should not be able to get copies


If keys can be borrowed a duplicate can be cut locally, then the borrower becomes an unauthorised master key holder.

Cylinder systems that rely on copyright protection can no longer be legally protected from others manufacturing and selling ‘pirate’ key blanks. Only cylinder systems that offer Patent protection for their keys can truly protect against illegal key blank duplication.

Patent protection prevents unauthorised duplication of the key
● Manufacturer can impose restrictions on key copying
● Manufacturer can control who has access to key cutting
● Keys cannot be cut at any high street shops without legal implications

CLUTCH RELEASE FUNCTION (euro cylinder with thumb turn)

● When the key is inserted into the cylinder, the thumbturn disengages by use of a clutch mechanism
● This allows the door to be unlocked even if the thumbturn is being held in the locked position from the inside – ideal for situations where a non key holder could hold the thumbturn in the locked position to prevent the door being unlocked

CLASSROOM FUNCTION (euro cylinder with thumb turn)

● Provides the same functionality as clutch release plus
● The thumbturn can be rotated in one direction only via a ratchet mechanism in the turn side of the cylinder
● Person can only unlock the door from inside – ensures that somebody inside the room cannot lock anybody out but can always escape in case of emergency


● Construction keying allows the contractor of a project full access during the construction period
● On first operation of the building owner’s key, the construction key will be permanently disabled.

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