Features: *Made of powder alloy hot forming, high hardness, abrasion resistance, good resistance and longer life. *It's dry wet amphibious,small slot and high shapeness. * for cutting all kinds of metal, gem, jade, etc. *Note:To improve the service life,please add water for coolant when using tools. Specifications: Product Name: Grinding Cutting Disc Material: Metal Color: Silver Optional Wheel Diameter: 40/50/60mm Rod Shank Diameter: 3mm Max Speed : 20,000 RPM Suitable for: cutting all kinds of metal, gem, jade, etc. Quantity: 1 set Package Included: 1 Grinding Cutting Disc 1 Connecting Rod Note: 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data. _x000D_ _x000D_