mechanical transmission reverse (gears) threader speed:18-28RPM, 51RPM reverse (saving time) for threading CSA (cus) certified quick and effortless production of safe precision threaded joints to approved standards BSPT 1/2"-2" NPT 1/2"-2" Motor: 1350W Universal 115V or 220V, 50-60Hz Switch: Heavy-duty paddle-type switch. Gear Housing: Aluminum Speed: 18-28 RPM for threading, 51RPM reverse Capacity: 1/2" - 2 " Die Heads Included: 1/2", 3/4", 1", 1 1/4", 1 1/2", 2"(Type 11R) for threading Weight: 8KGS, Power Drive only Mechanical transmission reverse (3-times faster than threading)