ARTU Tungsten Carbide Hole Saw w/Arbor and Pilot 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. Diameter 3-1/4 In., Material Tungsten Carbide, Cutting Depth 2-1/4 In., Pkg Qty 1, Package Type Clamshell