Patlock is the new ultimate deterrent French double door patio door locking device. Designed and constructed to prevent break ins from this form of attack. The patlock has become the asked for high security locking device. it will fit almost any type of double door french patio lock set and securtely jams the handles together quickly and securely. Due to the unique security spindle set included in each set it also ensures that even if the handles are removed externally the device is retained to the inside of the property maintaing the security. A high visibility deterrent that is quick and easy to both fit and use and requires no drilling or installation experience or skills.