Security Keys, also known as restricted keys allow control over who is able to get keys duplicated. The keys are registered to a specific locksmith, and only that locksmith can cut the keys. On issue of the key system a Signature Form is signed by all who are allowed to authorise keys. A signed letter from the registered authorised person is required to obtain any extra keys. Glebe Point Locksmiths holds a large number of Security Key Systems in the Inner West Locksmith Area.