CISA Bump and Snap


Passive Security
Protecting against forcible entry

An intruder seeking to break open a door will in most cases choose to "attack" the lock cylinder using tools of the trade: drills, lock picks and other lock forcing tools.

Passive security is a 'defensive' element because it protects against forcible entry tools with specific mechanisms that provide five types of resistance.

1 - Pushing resistance
CISA cylinders have a cam that protrudes from the cylinder body, to anchor them more firmly to the lock. This projecting cam, in addition to anchoring the cylinder more securely, also prevents it from being dislodged by a hammer blow.

2 - Drill resistance
Depending on the model, CISA cylinders incorporate one or more steel components in the cylinder which are designed to resist or delay attacks from a drill.

3 - Picking resistance
Intruders use lock picking tools to simulate the action of a key. Some high security CISA cylinders have a design and pin configuration pattern that is specifically made to resist manipulation by a pick.

4 - Snapping resistance
Some CISA cylinders incorporate solutions for enhanced resistance to snapping or tearing. A laminated strip of hardened steel and flexible stainless steel is incorporated into the cylinder's longitudinal axis to counteract such attacks. The unique patented laminated steel is also visible from both ends as an added visual deterrent.

5 - Bump resistance
Bumping of cylinders is becoming more of an issue throughout Europe, particularly as there is no sign of forcible entry for homeowners to claim on insurance. BKP patented device is fitted as standard on Astral S and AP3 S systems.

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