High Quality Content by WIKIPEDIA articles! Tongue-and-groove pliers—also known by various other names, including water pump pliers, adjustable pliers, groove-joint pliers, and Channellocks—are a form of slip-joint pliers. 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 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.Tongue-and-groove pliers are commonly used for turning and holding nuts and bolts, gripping irregularly shaped objects, and clamping materials.

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