[] The diamond cutting wheel is made of steel, which is more than ordinary grinding wheels. The wheel is coated with fine diamond particles [Diamond cutting wheel size ]Wheel Diameter, 25mm / 0.98-inch, Hole Diameter: 3mm / 0.12-inch, Mandrel Length,37mm / 1.45-inch, Mandrel Diameter, 3mm / 0.12-inch [Product design features]Full sand wheel, high cutting efficiency, high durability. The kits are good rotating tool accessories. Mandrel handle diameter 3mm, for most small drill and electric grinders. Suitable for most rotary and pneumatic tools. [Multi functional use]Suitable for stone, glass, ceramics, ceramic tiles and other hard materials cutting, sharpening, carving and grinding. [Please pay attention to safety]If the cut wheel becomes very hot during cutting, please add some water to keep it cool. Please be careful when using mandrel diamond cutting tools.Proper operation and maintenance are crucial to safety and maximize the lifespan of the wheels Colour:As Shown Material:Metal Package Contents: 10x grinding wheels 2x spindles 1x wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.