Next Generation 11 Amp AC/DC 11,000 rpm motor provides the best power to weight/size ratio available Dust Ejection System provides durability by ejecting damaging dust and debris particles that enter the tool Oversized brushes provide 2X brush life over previous model (D28402) Large spiral bevel gear provides long transmission life One-Touch Guard allows for 360 degree rotation of the guard with a single action Quick-Change Wheel Release allows tool free wheel removal without need for a wrench Top mounted and protected spindle lock button maximizes depth of cut without comprimising durability Uniquely small gripping surface in this power class allows for the best comfort available in this class Newly designed side handle provides excellent ergonomics while oversized threading provides durability Auto-off brushes shut the tool down when the brushes need replacing to avoid tool damage Paddle switch with safety lock-off prevents accidental start up Matching wheel flanges allow the use of common accessories