21.2 cc professional-grade, 2-stroke engine for outstanding performance 20" double-sided, double-reciprocating RazorEdge blades are precision ground and laser cut for long-lasting sharpness Commercial-duty air filtration system for long engine life Large ergonomic front handle with safety guard for increased comfort and control Large rear handle provides comfort and great control Rigid support bar allows straighter and more precise cuts Tool-less air filter cover for easy access