Features: Wide Applications: This diamond grinding wheel is suitable for grinding hard materials, such as gem, stones, granite, marble, glass, hard alloy, ceramic, etc. High Quality: Made of premium diamond with strong adhesion, high strength and durability, which can last for a long service life. Multifunction: It can also be used for polishing grinding sanding and other operations, and you can use it to achieve different results. Multiple Choices: There are 5 different thickness of grinding wheel, 10mm, 15mm, 20mm, 25mm, 30mm. You can choose the suitable one as your needs. Easy to Use: Just install it on the grinder or hand electric drill, you can use it easily.