Lineman's pliers

Lineman's pliers (US English), also known as linesman pliers, combination pliers (UK / US English), or "Kleins" (a genericized trademark in North America), are pliers commonly used by lineworkers and electricians for gripping, twisting, bending, and cutting wire, cable, and small metal components. Their design provides a high mechanical advantage, allowing significant gripping and cutting force to be applied at the jaws.

Lineman's pliers typically have a flat gripping surface at the tip of the jaws. By contrast, combination pliers usually have a shorter flat section and a concave gripping area designed for holding round stock such as metal rods. Both types typically include a beveled cutting edge near the pivot, similar to that of diagonal pliers. Some models also incorporate additional gripping, crimping, or wire-shearing features near the handle side of the joint. Designed for potentially heavy manual operation, these pliers typically are machined from forged steel and the two handles precisely joined with a heavy-duty rivet that maintains the pliers' accuracy even after repeated use under extreme force on heavy-gauge wire. They typically include coated handles for improved grip. Some handles provide electrical insulation, although many models are not rated for use on live circuits. Some pliers are certified to withstand a specified voltage, e.g. 1000 V.

Variants of lineman's pliers are also used in some glassworking shops for manipulating and breaking glass components.