Many front-door locks operate in this fashion but do not allow the lever to open the door from outside, stopping anyone from gaining entry without a key. You also need to know how your lock is operated - the majority of multipoint locks are lever operated, whereby you lift the lever upwards to engage the locking points, then turn the key to deadlock it. The more common locking point types are shown in the following illustration In addition to the latch in the centre, your lock may also have a combination of hooks, deadbolts, roller or mushroom cams etc. There are many different types of locking point so be careful when you check! ![]() You will also need to check the various dimensions between the locking points, try to match these up with the technical drawings on the product pages. Two vital measurements to check are the PZ (sometimes called the “centre size”) and Backset sizes, as shown in this lock case diagram Measuring a uPVC multipoint door lock mechanism To make it easier to identify a door lock, it helps to remove the lock from the door first. Some uPVC door locks (such as Winkhaus, Safeware, ERA, GU, Fuhr, Maco, Roto for example) should have a logo on either the faceplate that runs along the edge of the door, or on the lock case itself. The lock should show a manufacturer’s name or maybe a serial number. When trying to identify your uPVC door lock, the first step should be to check to see if the lock has any markings on it. These locking points provide increased security for your home whilst offering improved seal compression, and are available to suit all types and styles of doors. It features multiple locking points made up of a central deadbolt pin and works together with various bolts and hooks that lock into place when the handle is operated. This is a special type of locking mechanism that is fitted to the full length of a door.
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