It comes in a two sizes, a body length (depth) of either 65mm (2.5″) or 75mm (3″) and in two finishes: Satin Stainless Steel and Evershine Brass Plate on Steel. Please ask us for more details about the Gridlock 5 Lever Mortice Deadlock if you require it.
There are two sizes of mortice locks: 21/2” and 3”.
Sometimes 5 lever mortice locks are confused with the less secure 3 lever mortice locks. You can check this by looking on the faceplate of the lock, the number of levers should be stamped there.
Backset is measured from the centre of the keyhole to the edge of the lock. Most backsets are commonly measured at either 44mm (for a 64mm (2½”) lock) and 56mm (for a 76mm (3”) lock). Typically a lock adjacent to a glass panel will be 2½” (44mm) and otherwise 3” (56mm), but you should always measure to be sure.
Face plate 175mm L x 25mm W. Case size 117mm H x 84mm D. 32-50mm door thickness. 15mm stainless steel reversible latch bolt.
Featuring five parallel levers that all need to be lined up by turning the key to allow the bolt stop to come across, it's an exceptionally difficult lock to pick. That's not to say that it can't be picked, as there are doubtless experienced locksmiths that have the required skill, but they're still highly secure.
What is the difference between a 3 lever and 5 lever lock? The difference between a 3 lever lock and a 5 lever lock is that a 3 lever lock is less secure because it has fewer levers which increases the risk of key duplication. Also, a 3 lever lock will NOT be BS3621 approved due to the poor security of the lock.
5 lever mortice locks can only be fitted to timber / wooden door frames. As it is a lock designed to be retro fitted it cannot be placed in door types such as uPVC doors, composite doors, aluminium doors etc. A 5 lever mortice lock is what you will need to protect your wooden door frame.
Case depth is also a common main concern when it comes to sash lock size, with the two most common being 64mm (2.5 inches) and 76mm (3 inches) for 3 and 5 lever sash locks.
Two standard backsets are 2-3/8” and 2-3/4”. Other backsets include 2”, used by National and Lori Lock, and 5” used by Weiser, Weslock, Kwikset and others. There are also extensions for some brands, like Schlage, that can extend the latch enough to have the lock located in the center of the door.
A 2 lever lock will be most suitable for your internal doors such as bathroom and bedroom doors, where high security is not a priority. A 5 lever lock will offer about 500 key differs, which decreases the probability of a duplicate key being nearby.
Similar to the other sash locks, there are industry standard sizes with the most popular being 2.5 inch and 3 inch. These have two square holes for the mortice bars of the handle and the turn and release to be fitted into.
Mortice locks are generally stronger and secure than a bored cylindrical lock. Ironically, installing a Mortice Lock initially can weaken the structure of a typical wooden door, but by choosing a 5 lever Mortice Lock your home will be more secure.
One of the main factors to consider is the backset, which is measured from the center of the lock's hole to the edge of the door. The backset measurement of a door determines if a lock will fit it properly. Door handedness, or the direction the door swings when opened, is another crucial factor for lock installation.
Deadbolt Lock
Deadbolts are unarguably one of the most popular type of door locks, and they are widely used for residential properties. They are opened by turning a knob or key without the use of a spring.
A pin-tumbler mortise lock is the most common type of mortise lock available. These Locks are very simple to operate and are fairly inexpensive. However, they are easily picked and are less secure than other types of locks. They are commonly found in older homes and apartments.
Generally, the minimum door thickness requirement for mortice locks/latches is 35mm although some heavy duty types will require doors to be 45mm or over. A lock should have strength at least equal to the door on which it is fitted. Such fitting must not weaken the door in order to accommodate the lock.
Whether your lock is broken and needs replacing or you're just ready for an updated look, mortise locks are generally simple to remove and replace; standard mortise lock replacement parts made by Emtek, Juralco, Pado, Papaiz or new-style Wright are easily interchangeable.
Mortise Cylinders come in three different sizes: 1" 1 1/8" 1 1/4".
Mortise locks are installed into a rectangular pocket cut out of the edge of a door. The term mortise refers to a hole or recess cut that allows the lock to be inserted. Mortise lock bodies look much different than cylindrical locks and allow for more working mechanics inside.