Hot tap using the DM3ME CH Mechanical Hot Tapping Machine. With the right hole saw, drill and cut into steel, copper or plastic pipe for up to 4” valves. DM3MECH contains the base machine, along with 7/16” Hex Arbor, 1/4” Drill Bit, Hole Saws 5/8”, 7/8”, 1 1/8”, 1 3/8”, 1 3/4”, 2 1/4”, 3 1/4”, Allen wrenches and toolbox. DM3ME CHB is the base machine in a toolbox only, without hole saws or arbor. Mechanical Hot Tapping Machines require a 1/2” drill motor, valves and fittings (not included). Versatile DM3MECH tapping machine is conveniently housed in a heavy plastic toolbox.