Dust ejection system through the air intake vents, low profile,one-piece brush arm, QuickChange wheel release allows wheel removal without need for a wrench, keyless adjustable guard, vibration reducing side handle, auto off brushes shut the tool down when the brushes need replacing to avoid tool damage, oversized, protected spindle lock button, paddle switch with safety lock-off prevents accidental start up, matching wheel flanges. Specs: max watts out 1,200W, HP 1.6hp, no load speed 11,000 RPM, use wheels RPM above 11,000 RPM, spindle thread 5/8"-11, paddle switch w/lock-on, dust ejection system, tool-free flange system, length 11-1/4", weight 4.6 lbs. Includes: two position side handle, depressed center wheel, keyless adjustable guard, wrench, kit box.