DEWALT D28140 6-Inch High-Performance Small Angle Grinder 13.0 Amp/2.3hp, 9,000 rpm DEWALT built G55 (AC) motor designed for faster material removal and higher overload protection Dual clutch protection prevents the gears from stripping and motor from burning up in a wheel pinch/stall increasing durability Dust ejection system provides durability by ejecting damaging dust and debris particles that enter the tool through the air intake vents Dual abrasion protection provides increased motor protection from damaging dust and debris ingestion one-piece brush arm prevents brush hang-up due to dust ingestion The Spindle Thread is 5/8"-11 for mounting wheels/discs, quick-change wheel release allows tool free wheel removal