This electric portable concrete mixer with steel blades and flat freetires comes with a 1/2 hp single phase motor which operates on 115 voltpower. The sturdy polyethylene drum turns at 31 rpm and has 3 metalmixing blades and holds two 80 pound bags of pre-mix concrete. Thetough steel frame comes fully assembled all you need to do is attachthe retractable steel handles and grips, this rugged mixer only weighs123 pounds