Locking pliers or mole grips are pliers that can be locke into position. One side of the handle includes a bolt that is used to set their size of the jaws. Especially in larger models, the other side of the handle often includes a lever to push the two sides of the handles apart to unlock the pliers. "Vise-Grip" is an eponymous brand of locking pliers made by Irwin Industrial Tools.