Spyder 600887 Spyder 13-Piece Bi-Metal Arbored Hole Saw Kit SetSpyder 600887 Tough bi metal hole saws cut 5x faster than standard hole saws and last longer in various drilling applications Create smooth cuts in steel, stainless steel, aluminum, wood with nails, non ferrous metal, plastics PVC and more Use with Spyder's Rapid Core Eject arbor system to remove cores without prying, cut at an angle, and enlarge existing holes Variable tooth pitch provides a fast clean cut through all material thicknesses up to 1 7 8