The Groove Joint Pliers Set includes one 10 in. and one 12 in. They are also known as tongue and groove pliers are often used for gripping irregularly shaped objects. They can also be used for clamping materials. They are also commonly used for turning and holding nuts and bolts. An advantage to this design of pliers is that it can adjust to a number of sizes without the distance in the handle growing wider. These pliers generally have long handles for increased leverage.