This deadbolt lock allows you to protect yourself against the growing number of break-ins by those using lock bumping, lock-picking, or even an old copy of the key.
Will not work on electronic deadbolts, double sided deadbolts, or deadbolts where the inside depth of the rosette is greater than 1/2 inch or width of rosette is greater than 2.5 inches. See photos.Rare thumb turns have a bevel (slant) to them that acts as a wedge when the key is turned and it will push the flip guard out of position. If you find this happening after installation, rotate the flip guard under the thumb turn by 180 degrees.
Using a unique flip guard system, the guard, when closed, locks your deadbolt's thumb turn in place. This stops the cylinder from spinning so that the lock cannot be opened -- even with a working key!
When in the open position, the locks function as they always have.
It’s a great feeling knowing -NOBODY- can unlock your deadbolt in the middle of the night or any other time.
Get one for all exterior doors for discounted pricing