Tongue-and-groove pliers

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Tongue-and-groove-pliers in extreme positions, size 10 inches

Tongue-and-groove pliers—also known as water pump pliers, adjustable pliers, groove-joint pliers, arc-joint pliers, Multi-Grips, tap or pipe spanners, gland pliers and Channellocks (i.e., Channellock brand pliers)—are a type of slip-joint pliers.

Design[edit]

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.[1][2][3]

Uses[edit]

Tongue-and-groove pliers are commonly used for turning and holding nuts and bolts, gripping irregularly shaped objects, and clamping materials.

History[edit]

This design of pliers was invented and popularized by the Champion–DeArment Tool Company in 1934 under the brand name Channellock (after which the company was later renamed)[4] but are also now produced by a number of other manufacturers.

Gallery[edit]

References[edit]

  1. ^ US 2592927 
  2. ^ US 4890519 
  3. ^ "Common Maintenance Tools and Their Use: Water-Pump Pliers and Groove-Joint Pliers". Aviation Boatswains Mate E - Aviation theories and other practices. Retrieved 2010-03-29. 
  4. ^ US 1950362