Irwin 10234 Step Drill Bit, 3 16" to 7 8", Black Oxide HSS, 3 Flats Shank 21036 180 Degrees F Operating Temperature 180 Degrees F Operating Temperature Maximum 180 Degrees F Connection Type FNPT Inlet Connection Type NPTF Outlet Connection Type NPTF Inlet Connection Size 3 4 in Outlet Connection Size 3 4 in Pipe Size 3 4 in Pressure Adjustment Range 50 to 110 psi Pilot Adjustment Minimum 50 psig Pilot Adjustment Maximum 110 psig Factory Set Pressure 80 psig Max 98 Fixture Ballast Type Electronic Ballast Bulb Type Compact Fluorescent Starter Required No Frequency 50 60Hz Max Shank Diameter 3 8 in Overall Length 2 7 8 in Size Range 3 16 in to 7 8 in Step Thickness 5 32 in Drill Bit Sizes Included 3 16 in Maximum Drilling Depth: It has a maximum drilling depth of up to 1 8 inch