With nylon fiber and nylon scrim backing that allow for a thick combination of resin and grain, this Bear-Tex® Vortex® Rapid Prep™ A/O medium grit TS (Type II) non-woven quick-change disc stays stiff even under extended, heavy use. Clean bond resin technology creates a smear-free finish, even on alloys high in nickel and it reduces loading on the soft metals for which this disc was designed, including aluminum, carbon steel and titanium. With a patented Vortex® blend of agglomerated aluminum oxide, this medium grit disc acts like a fine grit disc, offering a superb final surface finish on stainless soft metals.