Some upvc doors however may use screws with a hexagonal indentation in the screw head.
Locking double glazed doors.
The other leaf is considered inactive and remains locked the majority of the time.
In this case an allen wrench also called a hex wrench is the proper tool.
One leaf is considered active and can be opened and closed using a knob or lever.
A set of double doors consists of two door leaves installed in a single frame.
Most strike plates are held in position with phillips cross head screws.
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How to change a upvc door lock.
Grab a screwdriver or allen wrench that matches the screw heads.
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