GU Locks provide locksmith services for Guildford and the surrounding areas. We are operating all year round and our services are fully guaranteed. We can be contacted at any time day or night.
Locks like many other items in our home are objects that we all take for grunt until such time when we face a problem that is out of our control such as being locked out of the property or lock failure (Broken keys, mechanism failure). Often than not it happens at times when we are least prepared for this eventuality. 
This guide is aiming to explain five basic points which common to most homes and would able to benefit the user when dealing with a locksmith.
What is BS3621?
Standardised by the British Standard Institute, 
the BS3621 lock is classified as Thief-Resistant Lock which is normally fitted on the external doors. Stand to reason why most insurance companies require homeowners to install these locks on their properties.
What is a deadlock mortice lock?
A mortice deadlock is
fitted inside the body of the door in a predetermined pocket which is aligned with the door frame. Once it was inserted into the door, it allow for a cleaner, more professional finish to the house entrance and provide cover for the looks from interfering hands and the elements. Additionally, it provides a sleeker finish to entrance doors and buildings. Operated by a key, the lock will protect the property and can only be reopened by using the correct key to unlock manually.
Is a Sashlock a mortice lock?
Otherwise known as Sashlocks, the mortice
sash locks, offer the same level of security as a regular Mortice lock however, it combines the mechanism of a deadbolt, latch and handle mechanism. A Sashlock is a prevalent choice for lever locks which are commonly used on interior and exterior doors, usually fitted within the body of the door.
What is a night latch lock?
A night latch is mounted onto the surface of a door on the internal side as
opposed to being fitted within the door itself. It can then be locked into position from the inside meaning the key cannot be turned from the outside. Most night latch locks are designed to lock the door once the door was slammed shut (The cause of many lockout calls).
What is a hinge bolt?
The hinge bolts are designed to prevent doors from being lifted from
their hinges. It’s manufactured from hardened steel and therefore resists hacksawing. Hinge bolts are essential for all outward opening timber external. Helps in preventing doors from being lifted under attack.
GU Locksmith Services approach each job with a fresh look, in fact, every task we are entrusted with is in some ways different from previous
experiences. While preparing to carry on repairs either within working hours or during the night for emergency calls, we carry a large number of spares and new locks to suit most doors and scenarios.