17.1 inch pool wire brush is built from corrosion resistant aluminum, so it does not discolor and remains durable. The aluminum handle is lightweight and aging resistant. High density straight bristles deliver high cleaning efficiency. Curved ends for corners: Curved edges reach hard to clean corners and crevices, providing a thorough and even finish. Adjustable and compatible: The brush head includes a screw hole to connect to a telescopic pole; the handle length can be adjusted easily to reach and remove dirt and moss. Wide compatibility: Heavy duty brush head suitable for thermal pools, spas and small swimming pools with constant temperature. Use scenarios: - Clean spa walls, corners and around jets where grime tends to accumulate. - Scrub the floor and walls of a small pool to remove dirt and moss. - Maintain heated or constant temperature pools, including pool steps and edges where debris collects.