Ideal for grinding and finishing hard-to-reach areas and removing rust, paint, and burrs, metal preparation, and weld cleaning. For 4-1/2" and 5" grinders with 5/8"-11 threads. Includes 1 each: 4-1/2 60-gauge zirconium abrasive flap disc, 3" knot wire cup brush, 4" knot wire wheel.