Deadbolt. This lock type is considered to be the most secure one. These locks are sturdy and really hard to break. They can be single-cylinder or double-cylinder.

Restricted or 'security keys' were originally designed as a security solution to prevent unauthorised cutting of keys. Usually installed in conjunction with a Master Key System, this would enable the client to maintain complete control over user access ( access control).

Keys are symbols of opening and closing. Locks and keys affect our lives in various ways. Sometimes a key means the difference between freedom and incarceration, or life and death. Keys also affect our lives in other ways; they give us security – we can lock our door and know that no one else has the key.

High security locks traditionally offer a very high number of real and theoretical key differs to prevent cross keying and allow for complex master keying configurations. Almost all high-security locks have components designed to resist manipulation from lockpicking and decoding attacks.