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 in valves. DM3MECH contains the base machine, along with 7/16 in Hex Arbor, 1/4 in Drill Bit, Hole Saws 5/8, 7/8, 1-1/8, 1-3/8, 1-3/4 , 2-1/4, 3-1/4 in, Allen wrenches and toolbox. DM3MECHB is the base machine in a toolbox only, without hole saws or arbor. Reed's Mechanical Hot Tapping Machines require a 1/2 in drill motor, valves and fittings that are all sold separately.