Square tubing is a type of tubing that has a square cross-section and is typically used in construction, manufacturing, and industrial applications. Square tubing is made of steel, and is available in a range of sizes and thicknesses.

Square tubing is strong, durable, and lightweight, making it ideal for use in a variety of applications, including the construction of frames, supports, and guardrails, as well as for use in the manufacture of furniture, signs, and other products.

The square shape of the tubing provides a large, flat surface area that can be easily cut, drilled, and welded, making it a versatile material for many types of projects. Square tubing is also easy to install, as it can be cut to size and fitted together using fittings and connectors.

In addition to its strength and durability, square tubing is also available in a range of finishes and coatings, including galvanized, powder-coated, and anodized, to provide additional protection against rust, corrosion, and other forms of damage. The finishes and coatings can also enhance the appearance of the tubing, making it an attractive option for use in both functional and decorative applications.