The high power to weight ratio, when compared to similar 4-stroke models, allows you to run this unit under less strain and still get the job done. This ensures a prolonged engine life. The low weight coupled with the twin shoulder harness ensures you can use this unit for long periods of time without strain on your back, shoulders, or arms. The straight, split shaft allows you to split the unit in half, allowing for easy transportation and easy storage. Switching between the metal blades a 2-String head is easy, and the shaft simply locks into place. The bump feed allows you to simply ‘tap and go’ if you need to release more nylon string. Control of cutting your garden easier