Plumbing Pliers are commonly used for turning and holding nuts and bolts, gripping irregularly shaped objects, and clamping materials. They have serrated jaws generally set between 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 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 for increased leverage. It is common in Europe, where it may be called a "pipe wrench", "Swedish wrench", or "Swedish pattern wrench". Plumbing Pliers are also known as tongue and groove pliers, water pump pliers, adjustable pliers, groove-joint pliers, arc-joint pliers, multi grips, and channellocks.
The plumber wrench was invented in the year 1888 by Swedish inventor Johan Petter Johansson. His wrench shares some principles with both the Stillson-pattern pipe wrench and the rigid pipe wrench. Nevertheless, it is a decidedly different and improved tool. It allows plumbers to use the wrench rather than a pair of tongs to separate or join pipes.