Engert Drop-in Lock Bolt for Standard, Sliding, Patio, and Screen Doors

Price: $12.95
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Simple to use, Inexpensive, VERY Secure! The Engert Drop-bolt locks many types of doors from the inside.

Used by Hotel and Motel chains to secure patio doors from the inside, the Drop-bolt locks can be mounted on wood or metal doors and jambs.

Positive locking, protected from outside attack, yet easy to lock and unlock. Use in either direction.

Tip: Mount the drop-bolt high on the door and jamb to keep the toddlers from wandering from the house.

We stock all 4 sizes in the Nickel finish. Choose Model number:

  • 4 - for extra tight corners (1/2 inch shackle width)
  • 5 - for tight corners (3/4 inch shackle width)
  • 10 - for most corner applications (1-1/4 inch shackle width)
  • 20 - for offset mounting (2 inch shackle width)

How do I determine what size I need for my door?

The best way is to measure the mounting space available on both the door frame and jamb (or wall to which the door closes). In other words, simply add the total amount of space on each surface that can be used for mounting the latch.

So if the door frame had an inch and a half (1.5")and the the jamb was two inches (2") wide, the total amount of usable space would be three and 1/2 inches (3.5").

Make sure you do not include the space where the glass is inset. Also, each mounting casting is about an inch wide so you should have at least an inch on each surface to use.

The following guide will help:

Mounting Space Available
(Total, 2 Surfaces)

Engert Patio Door Security Latch
2 and 3/4 inches minimum (2.75") #4 - Extra Narrow
3 and 1/4 inches minimum (3.25") #5 - Narrow
3 and 3/4 inches minimum (3.75") #10 - Medium
5 inches or more (5" +) #20 - Wide

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