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A spring-loaded glass breaker takes away the need to swing a tool to break a window. To break the glass, the metal tip is held up against the window and a pin is pulled back and released to activate a spring, either automatically or manually.
An exploded view of an automatic center punch. An automatic center punch is a hand tool used to produce a dimple in a workpiece (for example, a piece of metal). It performs the same function as an ordinary center punch but without the need for a hammer.
Glass relocking device A glass relocking device is a piece of glass, usually tempered, placed where it might be expected to break in a burglary attack. It is attached, usually with wires, to one or more spring-loaded bolts, which are often randomly located. A drill or torch may break the glass, releasing the bolts. Key cut
Some high-security safes use a tempered glass relocker. This has wires that lead from the glass to randomly located, spring-loaded bolts. If a penetrating drill or torch breaks the glass, the bolts are released, blocking retraction of the main locking bolts. A gas abrasive drill can sometimes be used to safely drill through a glass relocker.
It is a spring-loaded bolt with an angled edge. [1] [2] When the door is pushed closed, the angled edge of the latch bolt engages with the lip of the strike plate; a spring allows the bolt to retract. Once the door is fully closed, the bolt automatically extends into the strike plate, holding the door closed.
Crash bar doors in a school, with upper vertical rod latches. A crash bar (also known as a panic exit device, panic bar, or bump bar) [1] [2] is a type of door opening mechanism which allows users to open a door by pushing a bar.
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