The Irwin Tools 4935580 3-Piece Original Locking Pliers Set In Black Tray Contains the 10CR, 7CR and 5CR locking pliers. These redesigned curve jaw locking pliers feature a self energizing lower jaw that allows you to maximize you holding and gripping force with very little pressure applied to the pliers. Because of the self energizing lower jaw, it requires a lot less effort to lock and unlock the pliers, while still getting the grip you need to get the job done. The new jaw is also redesigned to provide better gripping on flat, hex, and round surfaces. The Vise-Grip has been a trusted tool for decades, and this latest version continues that trust while making the job easier and faster. With this set, you get a 10-Inch, 7-Inch and 5-Inch version to allow you to perform a variety of tasks of all different shapes and sizes. All of the Vise-Grip locking pliers come with the Vise-Grip Lifetime Guarantee.