100% brand new and high quality Used for fixing drill bit, milling cutter, and others. Turn on the grinder, keep it rotating into the locator, the grinder can punch accurately. Very easy to operate and maintain. Specifications: Material: plastic Color: black Inner diameter: 20mm Base diameter: 60mm Quantity: 1 pc Note: Note: Please allow 1-2mm differs due to manual measurement, thanks. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, Thank you!