NORTON's SG Blaze F980 cuts faster than other discs, lowering grinding costs on stainless, carbon, and mild steel, and all weld grinding applications. Sharper ceramic grains present keener cutting edges. Each grain continually fractures in the grinding process, along sub-micron faults in the crystalline structures, exposing sharp new cutting edges. Available in 4.5-, 5-, 7-, and 9.125-in. diameters, and in grit sizes ranging from 24 to 80.