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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.
Mole branded Self-grip wrench locking pliers. Thomas Robb Coughtrie (25 November 1917 – 27 August 2008) was a chartered engineer from Motherwell, Lanarkshire, Scotland.. He was credited by The Times as the inventor of the self-grip Mole wrench [1] although this conflicts with other sources which show the invention of the Vise-Grip locking pliers [2] in Nebraska, United States, with an ...
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. The jaws vary widely in size, from delicate needle-nose pliers to heavy jaws capable of exerting much pressure, and shape, from basic flat jaws to various specialized ...
Channellock is an American company that produces hand tools and automotive accessories.It is best known for its pliers—the company manufactures more than 75 types and sizes of pliers [1] —particularly its eponymous style of tongue-and-groove, slip-joint pliers. [2]
The wedges grip an area of 75 mm 2 (0.116 sq in) and the shank is inserted 40 mm into the chuck. SDS-top A 14 mm shank similar to SDS-plus, designed for hammers from 2 to 5 kg. The grip area is increased to 212 mm 2 (0.329 sq in) and the shank is inserted 70 mm. This size remained uncommon and was discontinued in 2009. [5] SDS-max
A plumber wrench A plumber wrench, with the key ring on the thread of the left handle Johan Petter Johansson with his wrench. A plumber wrench (or plumber's wrench, pipe wrench, Swedish wrench or Swedish pattern wrench [1]) is a form of plier described as a pipe wrench that uses compound leverage to grip and rotate plumbing pipes.