High-performance, 2.3hp G55 (AC/DC) motor powers through material removal tasks, while minimizing the potential for overloads. Dust Ejection System™ provides dual-process protection against dust and debris injection. Low-profile, jam-pot gear case enables precise gear alignment, ensuring smoother, quieter operation. Auto-off brush-failure system cuts power when brushes need replacing, reliably avoiding costly maintenance issues. Vibration-reducing side handle helps enhance worker comfort. Keyless guard allows user to adjust for maximum personal safety. 5/8" arbor diameter. Type: Angle; Wheel Diameter: 4 1/2"; 5"; Speed: 9000 rpm.