In many cases, broken glass is an undesirable condition for the delicate material, but several tools are designed specifically for the purposes of breaking glass. The ability to safely break glass is useful for a variety of purposes ranging from safety to crafting. Glass breaking tools are designing to break or cut glass in a way that reduces the risk of injury to the user.
A regular hammer will effectively break the glass of a mirror or window, but car windows are made from tempered glass, which is difficult to break. Emergency hammers are specially designed to break through car glass in the event that you become trapped in your vehicle during an accident. Many emergency hammers feature a steel tip that ends at a sharp point rather than a flat edge like conventional hammers. The steel tip shatters the glass and allows you to exit your vehicle through the window. Emergency hammers may also feature additional tools like a blade to cut through a seat belt or a glowing stick to easily locate the hammer in the dark.
Spring-loaded glass breaking tools work on the same principles as emergency hammers, but they are more compact and portable. Instead of swinging the hammer at the glass to break it, spring-loaded glass breaking tools operate by placing the face of the device against the glass and pressing a button that releases a spring-loaded steel tip into the glass to break it. The devices are often included in emergency car kits.
If you don't need to break an entire plane of tempered glass, glass-breaking pliers may be more useful. Glass-breaking pliers clip away at small pieces of glass at a time to create a more precise cut. They are commonly employed in stained glass or other crafts. For larger sections of glass, combine a large set of glass-breaking plier clamps with a glass-cutting tool; scoring the glass before you snap it with the pliers creates a clean cut. The advantage of glass pliers is that they remove sections of glass in single pieces and reduce the number of razor-sharp edges along the glass pieces.
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