10.0 Amp AC/DC 11,000 rpm motor designed for faster material removal and higher overload protection. Dust Ejection SystemT provides durability by ejecting dust particles that enter the tool through the air intake vents. Jam-pot, low profile gear case provides precise gear alignment for a smoother, quieter transmission while allowing access to tight spaces. One piece brush arm prevents brush hang-up due to dust ingress. Quick-change wheel release provides easier and quicker wheel removal without the need for a wrench. Keyless adjustable guard provides tool free guard adjustment thus increasing productivity.