This Lenox 2991414CG is a 7/8" Carbide Grit Hole Saw. Designed with a carbide grit edge, this hole saw will retain its efficiency and sharpness, cut after cut. This grit saw is made durable by its tungsten carbide construction, providing tough resistance to scratches or breakage. It cuts best through hard materials like fiberglasses, ceramic tiles, laminates, and other abrasives. This carbide grit hole saw is one of Lenox's reliable tools that can give you the convenience you need without spending a lot of money and effort.