Our diamond wheels are titanium coated for durability. The diamond particles on the drill bit are polished finely and evenly, hard and not easy to wear This is a powerful sharpening tool with a hard diamond chainsaw so you can sharpening as fast as possible. And troublesome hand grinders. Wide Application: Our 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-, so you don't need to replace it as often. These sharpening stones 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, 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.