Designed to work with any variable speed hand drill to cut clean holes smoothly without snagging. Cuts abrasive construction materials. Tungsten carbide grit edge is self-sharpening for long cutting life. Extreme resistance to heat and abrasion. Arbor design allows for easy removal of cut material plug. For the builder, tile setter, homeowner, do-it-yourselfer, construction worker and other professionals. Drills ceramic tile, concrete block, cement board, brick, fiberglass, plexiglass, PVC (polyvinyl chloride), wood, cultured marble, drywall, plastic and nail embedded wood. Not recommended for use on metal. 3/8 In. shank. Includes arbor and pilot bit.