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Breaker-grozier pliers. Breaker-grozier pliers, or groziers, are pliers used by glaziers to break and finish glass in a controlled manner, a technique known as grozing.They are dual purpose pliers, with a flat jaw that is used for breaking out scores and a curved jaw that is used for grozing flares from the edge of broken glass.
An advantage of this design is that the pliers can adjust to a number of sizes without the distance in the handle growing wider. These pliers often have long handles—commonly 240 to 300 mm (9.5 to 12 inches) long—for increased leverage. [1] [2] [3] The weight of the tool can also vary, depending on the material used.
In 1934, a patent for this design [5] was granted, and in 1949, a trademark for the name "Channellock" was granted, with a first-use date of May 1, 1932. [6] From this point to the 1960s, the company began to focus more on the fast-growing pliers side of its business, developing improvements to the original design.
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A blacksmith using pliers Slip joint pliers Cutting wire with diagonal pliers/side cutters. Pliers are a hand tool used to hold objects firmly, possibly developed from tongs used to handle hot metal in Bronze Age Europe. [1] They are also useful for bending and physically compressing a wide range of materials.
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Needle-nose pliers, also known as long-nose pliers and snipe-nose pliers, are both cutting and holding pliers used by artisans, jewellery designers, electricians, network engineers and other tradesmen to bend, re-position and snip wire. Their namesake long nose gives excellent control while the cutting edge near the pliers' joint provides "one ...
Locking pliers remain clamped to an object without requiring continuous pressure on the handles based on the "over-center" principle. After being properly adjusted using a threaded screw, the pliers are brought to bear by cam action. In the process of being closed on an object the mechanism passes through a point of maximum tightest clamping ...