What type of wrench is specifically designed for installing faucets on lavatories?

A basin wrench is specifically designed for installing faucets on lavatories because it has a unique design that allows it to reach and grip the nuts that are often located in tight spaces behind sinks and faucets. The long handle of a basin wrench provides the necessary leverage to turn these nuts, while the adjustable jaw can secure onto various sizes of nuts commonly found in plumbing fixtures. This tool is particularly useful for working in cramped spaces where a standard wrench may not fit or be easy to maneuver.

The other types of wrenches, while useful for various plumbing tasks, do not possess the specialized design required for this specific job. A crescent wrench can adjust to different sizes but struggles with space constraints and may not provide enough grip in narrow areas. An adjustable wrench works similarly to a crescent, lacking the specific features intended for the tight spaces associated with faucet installation. A socket wrench is excellent for fasteners but does not accommodate the unique shape and positioning of the nuts used in faucet installations, making it less suitable for this particular task.