Locking pliers (or Vise-Grips or a Mole wrench or a vice grip) are pliers that can be locked into position, using an over-center toggle action.

Locking pliers can be used to handle materials whenever it would be awkward or uncomfortable to grip them directly, for instance when working with heat 

Pliers are a hand tool used to hold objects firmly, possibly developed from tongs used to handle hot metal in Bronze Age Europe. They are also useful for bending and compressing a wide range of materials.

A wrench or spanner is a tool used to provide grip and mechanical advantage in applying torque to turn objects—usually rotary fasteners, such as nuts and bolts