The Flat Extreme Coarse Purple (FEP) is a 120 Grit Disc for extremely rapid removal, up to 15 -20% faster than using the coarse blue Holey Galahad. It leaves a smooth but coarse finish and best used on flat surfaces. This is the coarsest of the original 6 hole disc designs made with meticulous care from the best quality carbide on the market. Beware of cheaper knockoffs and copycats with low prices and even lower quality. You WILL get what you pay for! With its six holes, Holey Galahad is engineered to "open a window to your work". There’s no stopping to lift the grinder and check your progress.