Tongue-and-groove pliers are a type of

slip-joint pliers Slip joint pliers are pliers whose pivot point or fulcrum can be moved to increase the size range of their jaws. Most slip joint pliers use a mechanism that allows sliding the pivot point into one of several positions when the pliers are fully ope ...

. They are also known as: * adjustable pliers, * Channellocks ( i.e., Channellock brand pliers), * water pump pliers, * groove-joint pliers, * arc-joint pliers, * Multi-Grips, * tap or pipe spanners, * swan neck pliers. * Monkey pliers.

Design

They have serrated jaws generally set 45 to 60 degrees from the handles. 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 Pliers are a hand tool used to hold objects firmly, possibly developed from tongs used to handle hot metal in Bronze Age Europe. They are also useful for bending and physically compressing a wide range of materials. Generally, pliers consist ...

can adjust to a number of sizes without the distance in the handle growing wider. These pliers often have long handles—commonly 9.5 to 12 inches long—for increased leverage. The weight of the tool can also vary, depending on the material used.

Uses

Tongue-and-groove pliers are commonly used for turning and holding nuts and bolts, gripping irregularly shaped objects, and clamping materials. It is also possible to rotate objects while keeping them in one position.

History

This design of pliers was invented and popularized by the

Champion–DeArment Tool Company Channellock is an American company that produces hand tools. It is best known for its pliers—the company manufactures more than 140 types of pliers—particularly its eponymous style of tongue-and-groove, slip-joint pliers. Its pliers have d ...

in 1934 under the brand name Channellock (after which the company was later renamed) but are also now produced by a number of other manufacturers.

Gallery

Image:440Tongue+and+GroovePliers.JPG Image:Klieste nastavitelne sika.jpg Image:Multiple pliers.jpg Image:Vandpumpetang.jpg Image:Wasserpumpenzangenschluessel-kl.jpg

References

{{Hand tools Pliers