Designed for precision and efficiency, this flap disc is an essential tool for working with ferrous metals, iron, steel, aluminum, and non-ferrous metals. Manufactured by Pearl Abrasive, it features a durable aluminum oxide material and a T-27 shape that provides high flexibility, making it ideal for various grinding and polishing applications. With a diameter of 4 inches and a grit step of 40, it is optimized for maximum performance at a rotation speed of up to 15,300 RPM. Packaged conveniently with ten discs per box, this premium line product ensures you have the right tools to achieve smooth and professional finishes in your metalworking projects.