Must be used with "MANTIS" E-System power head. E-System is designed to keep the weight distributed so the edger rolls along smoothly. Easy to maneuver when edging walkways and driveways. SPECIFICATIONS: 24.5" shaft length, steel cutting blade, steel blade guard, 6" diameter guide wheel. Adjustable cutting depth up to 2". U-shaped guide handle for operator comfort. 7.2 lbs. tool weight.