JIMMY-PROOF DEADBOLT LOCKS

Jimmy-proof deadbolt locks use an interlocking vertical bolt mechanism to provide maximum security. Additional security comes from two interlocking vertical bolts that engage the strike plate when the lock is closed. This means the door cannot be pried open because there is no room between the door jamb (where the strike plate is mounted on)and the door (where the jimmy proof deadbolt lock is mounted on) for a pry bar. There are two styles of jimmy resistant locks-single and double cylinder. The first needs a key to unlock the door from the outside. A knob or lever opens it from the inside. The double cylinder requires a key to open the lock from inside and outside. The double cylinder is recommended for doors with glass. (Double-cylinder deadbolts are not permitted in multi dwellings housing since they are an emergency escape deter-ant in case of a fire. The FDNY and NYC buildings department have classified double cylinder deadbolt illegal for this purpose. As well as many other city's around the United States. Jimmy proof locks are considered a higher level of security from the standard tubular deadbolts which are installed on most residential applications. With consideration to the mechanics of the jimmy proof deadbolt, and the way its level of security is upgradable, the jimmy proof lock has been the number one secondary lock choice of the New Yorker. Some of the accessories that are available to upgrade the security level of the lock are available below.

It is also a good idea to suggest one-way tamperproof screws be used with double-cylinder jimmy proof locks.