"Reed DM3MECH Pressurized Tapping Machinewith Hole Saws and Arbor (8350) Hot tap using the DM3MECH Mechanical Hot Tapping Machine. With the right hole saw, cut or drill into copper, steel, or plastic pipe for up to 4"" valves. DM3MECH contains the drilling machine, along with 7/16"" Hex Arbor, 1/4"" Drill Bit, 7 Hole Saws, hex wrench, and...