Description:Products with high hardness of emery material produced, durability is very high, the use of thin shape, more practical. When using, please pay attention to the following:1. On new tools need to be installed when the tool has to try to do a beating, beating, then it can not directly work to adapt to not jump in use. Otherwise, the tool is quickly worn out, carving things are not very smooth. How to adjust: Use a small wrench with a change handle to gently touch the rotary tool quick handle until the tool is smooth. The electronic machine is strictly prohibited, the adjustment method is to loosen the chuck, rotate the angle of the tool, or stretch and indent one point.2. Be sure to cool the water (like a drip device, such as a drip machine in a hospital), such as dry drilling, the diamond on the head of the tool is graphitized by overheating, and it wears out quickly.3. When drilling, try to avoid shaking, because shaking will cause local damage to the tool and accelerate the damage of the entire tool.4. Speed as high as possible. General requirements: the line speed is not less than 10-20 meters per second. Specification: Material: Carborundum. Head Shape: T Style: Orange Shank Diameter: 6mm Cutting Head Diameter: 8/10/12/14/16/18/20/25/30mm Quantity: 9 Pieces Product Application: apply to jade carving, stone grinding, ivory carving and other polishing crafts. Package Included:9pcs*Diamond Grinding HeadNote:1. The actual colors 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.2. Please allow slight manual measurement deviation for the data.