Features Can improve quality of materials such as stone and metal Very important part of machining process. Necessary, economic and efficient Efficient tools of small area polishing on metal and nonmetal materials Mainly for deburring, descaling, dust removal, oxide layer removal, coating removal Used on micro electronic equipments, jewelry, stamping, electric tools, etc Specifications: Max Diameter: 25mm / 0.98" Diameter of Shank: 3mm / 0.11" Color: Red, green, black, yellow Quantity: 12 pcs (3 for each color) Package Includes: 12 x Abrasive Wheel Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List