Door bolt

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A door bolt is a fastening that locks the door with a bolt that slides across until it engages in the frame. It can be worked by hand, with a lever or a knob on the inside, or with a key from outside.

The simplest ones, barrel bolts, are used on patio doors, storerooms or large gates and can only be locked from inside. Key-operated ones are fitted as a second lock on front doors and add another locking point.

A barrel bolt on the inside is useful at night, but it does not protect the house when you go out. If you want a second lock that also works from outside, what you need is a security deadbolt with a cylinder. We cover it under security deadbolts.

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Security deadbolts

Fitting of surface mounted security deadbolts with a cylinder, as a second lock on front doors, patios, storerooms and shops.

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Questions that mention it

What if the door is locked with the key?

When it is locked with the key, the opening depends on the cylinder. Many open without damage; if not, only the cylinder is broken and replaced straight away. Read the full answer

What is a FAC style security deadbolt?

It is a surface mounted security deadbolt fitted on the inner face of the door, usually above the lock, as a second lock. Read the full answer

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