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Often, round nose pliers have insulated handles for safe electrical work, a spring-fitted joint for ready opening and closing, and comfortable grips on the handles to make them easy to manipulate.
The materials used to make pliers consist mainly of steel alloys with additives such as vanadium or chromium, to improve strength and prevent corrosion. The metal handles of pliers are often fitted with grips of other materials to ensure better handling; grips are usually insulated and additionally protect against electric shock.
Lineman's pliers are used in the electrical trade to cut, straighten, and bend wire, and also to twist wires together when making splices. Lineman's can be used to strip wire and some types of cable, although wire strippers are more commonly used for this purpose as they can strip wire more quickly without damaging the conductors themselves.
The first locking pliers, with the trade name Vise-Grip, were invented by William S. Petersen in De Witt, Nebraska, United States in 1924. [1] [2] Later, in 1955, in the United Kingdom, M K Mole and Son, a hand tool manufacturing company, under the managing direction of Thomas Coughtrie, began making nearly identical pliers.
Knipex (English: / k ə ˈ n ɪ p ɛ k s /; [2] German pronunciation: [ˈknɪpɛks]) is a globally-distributed German manufacturer of hand tools, best known for its pliers.Knipex tools are principally used by professionals in various trades but find increasing popularity in DIY and EDC markets.
Diagonal pliers Diagonal pliers with uninsulated handles. Diagonal pliers (also known as wire cutters or diagonal cutting pliers, or under many regional names) are pliers intended for the cutting of wire or small stock, rather than grabbing or turning. The plane defined by the cutting edges of the jaws intersects the joint rivet at an angle or ...
In 1924, another blacksmith, Danish immigrant William Petersen of DeWitt, Nebraska, invented the first locking pliers [4] and named them Vise-Grips. [5] In 1934, Petersen formed the Petersen Manufacturing Company to produce them. [6] In 1957, Petersen added an easy-release trigger to the design, creating the modern locking pliers design. [7]
The lower jaw can be moved to a number of positions by sliding along a tracking section under the upper jaw. 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.
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