The Troy-Bilt 4 Cycle Trimmer with Brush Cutter features a 29cc clutched, 4 Cycle split boom, no gas and oil mix engine performance tuned ignition for more reliable starting. Press to start capable. Spring assist starting system. Straight shaft. Bump head with SpeedSpool 2 with brushcutter. 17" cutting swath, .105 diameter dual line, 8" 4-tooth steel brush blade for heavy vegetation, adjustable padded J-handle provides added control and easy right-or-left handed use, shoulder strap and oil included in carton.