Powerful 3.3 AMP motor delivers 4,000 SPM for the most demanding applications.Smaller circumference barrel grip (only 2-1/4”) for added comfort.Refined design at only 3.4 lbs. for increased control.Lock-on slide switch for continuous operation.Built-in thickness gauge for added convenience.Engineered for continuous operation in 16 gauge mild steel and 18 gauge stainless steel .Large easily replaceable blades with 8 cutting edge each