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, , glass, cemented carbide, and gemstones. They are also widely used in machinery, bearings, metal polishing, chainsaws, molds, wood, solder weld joints, grinding, burr grinding, and other applications. Color: gold Material: emery Package Contents: 60 diamond chainsaw sharpener bits 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.