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 base machine, along with 7/16in Hex Arbor, 1/4in Drill Bit, Hole Saws 5/8in; 7/8in; 1 1/8in; 1 3/8in; 1 3/4in; 2 1/4in; 3 1/4in; Allen wrenches, 18in shaft, 24in shaft 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" drill motor, valves and fittings that are all sold separately