The Fire Bird Cup Brush 100mm (M14) Twist Knot is a type of rotary brush designed for surface cleaning, rust removal, and deburring. It features twist knots made of abrasive material, which are securely twisted into the magnetic core, providing effective cleaning power. The 100mm diameter makes it suitable for various industrial and workshop applications. The M14 threaded arbor allows for easy attachment to power tools like grinders or drills, ensuring compatibility with standard equipment. This brush is ideal for use on metal surfaces, helping to achieve a smooth and clean finish efficiently.