Feature: 1. Durable: This electric bench grinder is made of premium iron and ABS materials, which can provides extra stability, durability and strength for this machine. 2. Applicability: This professional grade bench grinder is perfectly suitable for grinding and polishing metal, jewel, rock and other materials, which is very useful. 3. Adjustable Speed: The bench polisher has adjustable speed up to 10000rmp. Speed control provides better accuracy and support, as well as greater safety and control. 4. DIY Versatility: From extending the rock polishing kit to supporting other engraving machines and jewelry tools, this machine comes with additional accessories to support rust removal, metal grinding, drilling, sanding, engraving, and more. 5. Easy to Place: This bench grinding machine is small in size and can be placed on any flossy and flat platform for work, and the base of the machine is very stable. Specification: Item Type: Bench grinder Material: Iron, ABS Weight: Approx. 3990g/140.7oz Size: 22x14x17cm/8.7x5.5x6.7in Power: 150W Rated Voltage: 220V Speed: 0-10000r/min(Adjustable) Chuck Capacity: 3mm/0.12in, 4mm/0.16in, 6mm/0.24in Grinding Wheel: Diameter: 75mm/3in Thread: M10. Package List: 1 x Bench Grinder6 x Accessory1 x Instructions Note: 1. The power supply voltage should not exceed or be less than ±5% of the power specified on the tool nameplate.2. Allow the tool to operate without load for one minute before use. Check that the drive is flexible enough and whether the carbon brushes spark is normal.3. When the carbon brush is worn for a certain period, the tool will not runs smoothly, and the spark may be larger than usual. Users should pay attention to carbon brushes and replace them in time.4. Tools should be placed on a glossy work surface.5. It is normal for the new tool to have a slight tremor. After a few minutes of friction between the grinding wheel and the foam wheel, the chattering was significantly reduced.6. When fixing the flexible shaft, note that the interface between the flexible shaft and the grinder is a left‑hand thread.7. When replacing the grinding wheel, the side cover and flexible shaft should be put down first.8. When the bench grinder is working, place the workpiece on the workpiece support and slowly approach the grinding wheel or foam wheel. In this way, it can avoid that the power is too large and the workpiece follows the grinding wheel and hurts the fingers.9. The table mold grinder should be connected to the ground.