1、These high speed diamond coated cutting discs can be used with your rotary tool to cut a wide variety of materials 2、It features good wear resistance and good impact resistance in high-speed cutting 3、It can be used widely, for polishing and cutting the surface of the object 4、This cutting discs set included different size saw blades, diameter from 16mm to 20mm, meet your different needs 5、With plastic case, well protected cutting disc and convenient to storing. Descriptions: These high speed diamond coated cutting discs can be used with electric grinder,to cut a wide variety of materials,such as glass,  jade,  marble, tile and other products .It features good wear resistance and good impact resistance in high-speed cutting, is a practical tool set for your diy work. Features: These high speed diamond coated cutting discs can be used with your rotary tool to cut a wide variety of materials. It features good wear resistance and good impact resistance in high-speed cutting. It can be used widely, for polishing and cutting the surface of the object. Used matched with hanging mill or electric grinder, for cutting glass, jade, marble, tile and other products. This cutting discs set included different size saw blades, diameter from 16mm to 20mm, meet your different needs. With plastic case, well protected cutting disc and convenient to storing. Specifications: Material: titanium plated diamond Handle diameter: 3mm Model: 7 pc Solid wheels, 3 pc Holed Wheels Application: Jade/ Ceramics/ Glass/ Cutting/ Grinding/ Engraving Saw blade diameter:16mm, 18mm, 20mm, 22mm, 25mm, 30mm, 40mm, 20mm(with 8 holes), 22mm(with 8 holes), 25mm(with 8 holes) Weight:108g Package Included: 10 x  Diamond Cutting Discs