For a grinding surface that cuts like a coarse grit while giving your projects the finish of a fine grit, choose the patented aluminum oxide grain of this Bear-Tex Vortex Rapid Prep A/O coarse grit TS (Type II) non-woven quick-change disc. The nylon fiber and nylon scrim back support a thick resin bond and grain, making for a stiffer, longer-lasting disc. Clean Bond technology makes sure that your finishes stay smear-free, even on alloys high in nickel. Use this grit to blend welds together and finish softer metals, such as aluminum and titanium.