The LANDSH 5433 sink faucet requires 1 hole for installation. It can be installed in a hole drilled in an inset, undermount, or wall-mounted sink. Additionally, it is tall, making it suitable for freestanding sinks, such as countertop sinks, as it can also be installed on a countertop. Depending on the construction, it can be installed behind the sink or on the side. However, you should ensure that the water flow ends up in the center of the sink to be fully functional.