Self Sharpening, 2-1/4″ Cutting Depth, Long Cutting Life, Designed to be used with any variable speedhand drill, Mandrel design allows for easy removal of cut material plug, For the builder,tile setter, home ow-ner, do-it-yourselfer, construction worker and other professionals, Tungsten Carbide Gritted Hole Saws and accessories are available in individual sizes and sets