Dremel's line of Max Life high-performance accessories provides long-lasting performance and impressive durability. The Max Life 408HP Carbide Sanding Drum / Hole Saw Bit is engineered to last 30X longer than the Dremel 408 Sanding Band. The Max Life Carbide Hole Saw Bit functions as both a sanding drum and a hole saw capable of plunge cutting into a variety of materials. Ideal for a variety of materials including ceramic wall tile, hard and soft woods, composites, fiberglass, Masonite boards, rigid foam, gourds, and more. The 1/2 In. (12.7mm) 408HP features a coarse 60-grit carbide abrasive that provides a sanded finish as it cuts. Maximum operating speed is 35,000/min.