Adding a dead bolt
and upgrading both the dead bolt
and lockset to higher grade alternatives can offer more security.
The application for dead bolts
includes doors constructed of wood, hollow metal, Herculite, glass with metal frame, and doors where both leaves swing open.
According to Jim Brown, security facilities manager for TRW Space and Defense Sector, "In the past, to protect against unauthorized internal access, defense contractors have used an auxiliary spin-dial locking system, which has an automatic dead bolt
and requires a two-handed operation to unlock the dead bolt
and twist the doorknob to exit.
Even with a dead bolt
, the blow shatters the doorjamb and splits the door itself (even steel doors).
Specificatiion: Tamperproof Dead Bolt
Lock, Stainless Steel, Antirotation, Unique,
It's a little device that slides under the existing dead bolt
, preventing anyone from turning it from the outside, even with a key.
The folks at Simplicikey came up with a motorized dead bolt
lock and remote key fob.
Lock and unlock the dead bolt
from your computer or phone on a moment's notice, or program it to unlock at preset times.
You can spend hundreds on a fancy "pick-proof" dead bolt
for your entry door.
You use your dead bolt
every day without giving a thought to maintenance.
For a service door, the solution is to install a good-quality dead bolt
and reinforce the doorjamb and hinges to resist a brute-force attack.
These include safety features such as indoor sprinklers, smoke detectors and dead bolt