Eye bolt
Eye bolt Bolts can be used to provide extra security on external doors fit one to both top and bottom of the door.Barrel, padbolts and tower bolts can be screwed to Cabinet latches the sur¬face of a door.Each has a long bolt which is generally shot into a staple (a hoop of metal) fixed to the door frame.Always choose a bolt with a heavy-duty staple and long fixing screws.Alternatively, the bolt may be shot into the sill or floor or into the door frame.
The bolts are neither key-operated nor deadlocking and so may be easily undone if access is possible.If you want to use one near glass, chose a padbolt – these can be secured by a padlock.
Flush bolts work in a similar way to tower and barrel bolts – in that they shoot a bolt into the frame and are non-locking – but they are designed to be mortised into the edge or face of the door.This makes them particularly suitable for double doors or where a concealed fitting is required.
Locking bolts
You can get key-operated bolts which fit on the face of a door, but the better choice for a normal door is a mortise rack bolt.
For double doors which open out¬wards, fitting a mortise rack boll can be difficult and there is a special type of locking bolt which is fitted to the inner surface of the door and shoots a bolt up into a staple fitted to the underside of the top of the door frame.The lock is pushed to close: a key is needed to open it.
Because these locks are operated from the inside, they do not have as many key differs as external door locks.
Mortise rack bolts
These can be mortised into the edge of a wooden door and should be fitted so that the key is on the inside face.They are inconspicuous when fitted and will resist some forcing.The deadbolt is operated by a key and enters a striking plate mortised into the door frame.Each model usually has one universal key only.Some mortise rack bolts can be unlocked without a key these should not be used next to glass.
You should fit mortise rack bolls to both the top and the bottom of a door: on French windows, fit four not just two on the closing leaf.To do this you have to cut a mortise in