1/2-HP induction motor for quiet, smooth performance No-load speed: 3,550 RPM Wheel sizes: 6 in. x 4/5 in. x 1/2 in. Shaft diameter: 1/2 in. 2 flexible gooseneck lights for better illumination Adjustable tool rests Eye shields for safety Pre-drilled heavy-duty cast-iron base for stable, safe performance Includes 36G wheel, 60G wheel, and light bulbs Net weight: 20 lbs.