Use: Our diamond wheels are titanium plated, which means that the service life of these drills is much longer than that of other wheels without titanium plating. The diamond particles on the drill bit are polished finely and evenly, making them hard and resistant to wear. Fast Result: This is a powerful sharpening tool with high hardness diamond coating, allowing for fast grinding and efficient performance compared to manual files. Wide Application: The set includes three sizes suitable for various applications. Can be used for metal polishing, chain saw sharpening, woodwork, and more. Easy to Install: Easy to install and replace in just two steps. The titanium-coated surface is harder and more wear-resistant, reducing the need for frequent replacements. Suitable Type: 5/32 inch wheels for electric chain saws and other small blades; 3/16 inch wheels for small oil chain saws; 7/32 inch wheels for large oil chain saws. Color: Silver Material: Emery Package Contents: 18 x Sander (4mm, 4.8mm, 5.5mm 6 pcs each size) Note: Light reflection and different displays may cause slight variations in the color of the item shown. Measurement may vary by +/- 1-3cm.