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  2. Glass breaker - Wikipedia

    en.wikipedia.org/wiki/Glass_breaker

    An emergency hammer is a type of glass breaker shaped like a hammer. Emergency hammers are also known under various names, such as bus mallets, dotty hammers, safety mallets, and bus hammers. Many are attached to a cable or an alarm device to deter theft or vandalism. It is a simple tool with a plastic handle and a steel tip.

  3. Safe-cracking - Wikipedia

    en.wikipedia.org/wiki/Safe-cracking

    Scoping a safe is the process of drilling a hole and inserting a borescope into the safe to get an intimate look into a specific part of the security container. When manipulation-proof mechanical locks and glass re-lockers are implemented as security measures, scoping is the most practical option.

  4. Tempered glass - Wikipedia

    en.wikipedia.org/wiki/Tempered_glass

    Tempered or toughened glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. Tempering puts the outer surfaces into compression and the interior into tension .

  5. Ninja rocks - Wikipedia

    en.wikipedia.org/wiki/Ninja_rocks

    Ninja rocks take advantage of the physical properties of tempered glass, disrupting surface compressive stress and causing the glass to shatter. Tempered glass, which is used for the side windows of most vehicles, is manufactured with an extremely high surface compressive stress and high internal tensile stress. This gives it strength and ...

  6. Door breaching - Wikipedia

    en.wikipedia.org/wiki/Door_breaching

    The minimum standoff distance or minimum safe distance is the minimum distance from the explosive charge the breachers must be to avoid serious injury from overpressure. The minimum standoff distance is calculated based on the amount and type of explosive placed and is used to ensure that breachers do not experience greater than 4 psi (28 kPa ...

  7. List of killings by law enforcement officers in post ...

    en.wikipedia.org/wiki/List_of_killings_by_law...

    Due to heavy resistance that included bites, punches, kicks and a hammer throw, the officers used pepper spray and threw the man to the ground before handcuffing him. On the way to the transport vehicle, the man reportedly "slipped the officers' grasp" six times while descending five stories of staircase and during the ride, an officer, Lars S ...

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