This does not have a locking mechanism at the mid point of the door like a typical door lock.
Lockable bolts french doors.
A cremone bolt is a surface applied lock used on double or french doors.
French price and other details may vary based on size and color national hardware n197 988 v1922 flush bolt in solid brass 4 inch.
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Door hardware locks.
Surface bolt 4 in solid brass construction satin nickel finish 2 keepers.
Insurance approved products are available and many with multiple keys.
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You can then choose a non locking dummy lock for the left handed door.
This makes the two doors very difficult to pull apart.
The top bolt goes into the header and the bottom bolt goes into the floor.
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In a mul t lock lock there is a ball bearing in the bolt that will secure and lock into the strike of the other door.
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When the handle is turned both top and bottom bolts retract allowing the door to be opened.
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If you are investing in a mul t lock check out the prices on amazon for a double french door you do not want to get one with a thumb turn on the inside of the home.
Sumnacon 2 pcs door flush bolt 8 inch concealed security door lock for french doors composite doors wood doors double doors dummy doors brush stainless steel finish 4 7 out of 5 stars 174 12 99 12.