Neiko 30075A Heavy Duty Air Geared Orbital Sander with Pad, 8"/850 RPM Large eight inch PSA surface pad area allows work to bigger areas to keep flat while getting highs and lows for a smooth end Convenient thumb throttle switch offers user control over speed of operation to ensure there is not power overexertion Heavy weight regulator work efficiency and strength with ease and in support of grids for better sanding results Built-in muffler in rear exhausts offers soft, quiet vibrations and minimizes hand pressure Specialized finger molded handle prevents hand from slipping towards working drum and offering a secure grip