Delta 23-198 6-Inch Variable Speed Grinder with Toolless Quick Change 2,000 to 3,400-RPM for sharpening a variety of materials Cast Iron construction minimizes vibration during operation Toolless wheel changing Includes (1) 36 Grit Coarse Wheel, (1) 60 Grit Friable Wheel, (4) rubber feet to help prevent movement, 2 safety shields, worklight (40-Watt bulb not included), (2) fully-adjustable tool rests and diamond wheel dresser