Rugged welded aluminum frame. Swinging pipe vise to hold steel pipe. Switch push to operate remote waterproof control. Motor and magnetic reversing contactor are waterproof. Pull wheels are stud type tires with tubes. Sure grip. Hydraulic pressure on pull wheels to handle any load requirements. Worm drive gear box with heavy No. 50 roller chain drive can't drift. Overhead pipe guide extends to 10 feet above machine.