Double door astragal systems are equipped with space for upper and lower flush bolts that can vary in length depending on the level of security desired.
Locking french door bolts.
Because french doors have no center frame or support they are very weak in the center.
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.
Out of all the locking options to secure a french door a single sided deadbolt is the best option.
A crucial part within the astragal the bolt is used to protect your home from outside intruders unwanted air flow pests and moisture.
Astragal bolts are used to lock the inactive double door panel or the door that is not typically used for entry and exit in your french door system.