Blend and smooth your metalwork projects at up to a 15 degree angle by using the Blue Fire arbor thread plastic flat flap disc. The high-performance zirconia alumina plus abrasive gives the disc up to 30 percent longer life than comparable discs, and the plastic backing offers a conformity to surfaces due to its flexibility and trimmabililty. The disc is a quality choice for blending and deburring 400 and 300 stainless steels, soft carbon steels, titanium, bronze, brass, aluminum, and super alloys.