Features: Experience unparalleled precise with the Concave Diamonds Grinding Wheel, designed for polishing rounded edges and curved surfaces on glass, jades, agate, and more, ensuring flawlessly finish every time. Crafted from quality electroplated diamonds material, this grinding wheel offers exceptionals durability and cutting ability, making it ideal for intricate machining tasks. Perfect for jewelry designers, DIY enthusiasts, and stone industry professional who require meticulous grinding capabilities for their projects. Whether you're working on jewelry making, jades carving, or glass crafting, this tool provide professional grade results, enhancing both safety and aesthetic in your creations. With its universal 6mm shank design, the Diamonds Grinding Wheel is compatible for most electric tool, allowing for quick installation and efficient operate across various applications. Specifications: Component:Electroplating Emery Shaft Diameter:6mm Outer Diameter:20mm Grit:400 Option Width: 2mm/0.08inch,3mm/0.12inch,4mm/0.16inch,5mm/0.2inch,6mm/0.24inch,8mm/0.32inch,10mm/0.39inch,12mm/0.47inch; Package Includes: 1pc Concave Diamonds Grinding Wheel note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.