A water pump plier (box type) is a hand tool that is designed for gripping and turning objects with a wide range of sizes and shapes. The "box type" refers to the shape of the jaws, which are squared-off and can be adjusted to fit different sizes of objects.
Water pump pliers are commonly used in plumbing and mechanical work, as well as automotive repair and other applications where a strong, adjustable grip is needed for turning nuts, bolts, and other objects.
To use water pump pliers (box type), the user adjusts the jaws of the pliers to fit the size of the object they want to grip, then squeezes the handles together to clamp the jaws onto the object. The user can then turn the object by applying force to the handles of the pliers.