diamond wheels are titanium coated for durability. The diamond particles on the drill bit are finely and evenly, hard and not easy to wear This is a powerful sharpening tool with a hard diamond chainsaw so you can finish sharpening as fast as possible. And rid of troublesome hand grinders. Wide Application: set comes in three sizes for different sizes (5/32, 3/16, 7/32 Inches). You can use it for metal polishing, chainsaws, wood and more. The chainsaw sharpener is easy to install and can be replaced in just two steps. Plus, this titanium-coated file is harder and more wear-resistant, so you 't need to replace it as often. These sharpening are commonly used in the grinding and engraving of workpieces made of jade, ceramics, glass, cemented carbide, and gemstones. They are also widely used in machinery, bearings, metal polishing, chainsaws, molds, wood, solder weld joints, grinding, grinding, and other applications. Color: gold Material: emery Package Contents: 60 diamond chainsaw sharpener bits Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real . The measurement allowed is +/- 1-3cm.