The Intermatic T173 is a 40 amp 24-hour dual pole single throw(DPST) surface mount mechanical timer switch with indoor metal enclosure 120 volt in gray color finish. The Intermatic T173 time switches can also handle electrical loads up to 40 A per pole. The T170 Series Time Switches allow for up to 10 ON/OFF settings per day, but give you the additional capability of skipping days in which the loads may not be needed. Each time switch will come with one set of ON/OFF trippers as well as three skipper screws to omit the schedule for at least three days.