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The best lock for you will depend on the material of your door the type of door and the level of protection you require. Here we take a look at the types of locks available and some of their applications. Mortice sashlock - for timber doors. This type of lock is a mortice lock combined with a handle that operates the latch mechanism. This allows you to open and close the door without the need for a key and to lock it with a key as you leave the house. A three lever sashlock provides a mid-level of security whereas the five lever version provides a higher level. Five lever locks are usually used on back doors which require high levels of protection. Three lever sashlocks are typically installed on internal doors which need to be lockable.
When you buy a mortice lock of any kind make sure that it conforms to BS3621 and that it has the Kite Mark. This British Standard is a mark of quality and is also recognised by insurance companies. Timber doors fitted with five lever BS3621 sashlocks are considered to be high security doors (compared to other residential lock/door combinations) and can reduce the cost of home insurance. Mortice deadlock - for timber doors. A deadlock is usually used on a front door in tandem with a nightlatch. It is a key-operated single bolt. Deadlocks are fitted at waist height which gives extra security and they can be locked from inside and out.
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Most commercial lever locks are designed to ANSI Grade 1 standards which is the highest. Features of the Lever Lock: Standard door lock for commercial applications Available in mechanical electronic push button and biometric versions Available in many different types of finishes Meet ANSI Grade 1 and 2 specifications Protection of the handle with OverDrive™ technology ADA compliant Lever Lock Functions Available: Entry Function Privacy Function Passage Function Storeroom Function Classroom and Intruder Classroom Function In residential applications these locks are mostly used for interior doors such as bedrooms bathrooms and closets.