Durable to Use: diamond wheels are titanium plated, which means that the service life of these drills is much than that of other wheels without titanium plating. Besides, the diamond particles on the drill bit are finely and evenly, hard and not easy to wear Fast : This is a sharpening tool with high hardness diamond chainsaw, so you can finish grinding things as fast as you can. And rid of the troublesome hand . Wide Application: There are three sizes in set, which are suitable for different sizes. You can use it in metal polishing, chain saws, wood and so on. Easy to Install: The is easy to install, It can be changed in just two steps. Besides, this titanium-coated file is harder and more wear-resistant, so you 't have to change it often. Suitable Type: 5/32 inch wheels for Electric chain saw and other small blade, 3/16 inch wheels for small oil chain saw, 7/32 inch wheels for oil chain saw. Colour: Material:Emery Size:4.8mm x 45mm Package Contents: 12 x Burr Grinding Stone File Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.