The barrel bolt is.
French door top and bottom bolt.
Deltana 24sb10b oil rubbed bronze 24 inch surface bolt hd door bolt strike brass.
Evoking period french doors these have face mounted bars that run top to bottom and slot into sockets in the casing and threshold.
French doors use a barrel bolt as a top latch to secure one of the doors.
Four vertical one inch surface deadbolts each with a key secure one or both doors.
Brass beaded cremone bolt from 162.
Door hardware locks.
The door with the barrel bolt typically stays put while the other doors is used for traffic.
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French price and other details may vary based on size and color national hardware n197 988 v1922 flush bolt in solid brass 4 inch.
The problem with manual bolts is that a tall intruder can break panes to reach each bolt.
Art deco top and bottom bolts for french doors 88 504 88 525.