Premium aluminum oxide blends combined with a size coat of grinding aids delivers cool cutting and extends disc life. Provides fast material removal on a variety of ferrous and non-ferrous metals, including mild steel, stainless and aluminum. Ideal for weld preparation or for blending and finishing applications. The 5/8-11 Quick-Spin arbor eliminates the need for a locking nut. Quick-Spin discs require a compatible back-up pad.