Over the years, we have found that more than 2/3 of the wood carving grinding wheels on the market are not perfectly compatible with American angle grinders. Why not do it better? We know that there must be a more effective way. After trying several options, our team of engineers redesigned these grinding discs to fit most 4-inch and 4 1/2-inch American angle grinders. Pomsare -- was the solution to the problem! We knew we had the answer we were looking for and that would help millions of craft man who experience the same problem. These 4 different wood carving discs can meet your different needs, they can remove bits of wood quickly, saving your time and energy. Made of tungsten carbide, the angle grinder disc is durable and practical, not easy to break or deform due to sturdy construction. The wood grinding discs can be applied for wood trimming, root carving, tea plate, peeling, chamfering, trimming and deburring, polishing, manual DIY, etc. Also suitable for rapid removal and shaping, especially for convex and concave areas, bringing a lot of convenience to your work. Specifications: Material: Tungsten Carbide Bore Size: 7/8 OR 5/8 Inch Reducing Busing: 7/8 Inch to 5/8 Inch Includes: 1 x Grinder shaping abrasive disc (3 Teeth, 4 1/2 X 7/8 INCH) 1 x Arc wood carving disc (Gold, 4 X 7/8 INCH) 1 x Angle grinder wood carving disc (Gold, 3 1/2 X 5/8 INCH) 1 x Wood turbo carving disc (Blue, 3 1/2) 2 x Reducing Bushings (7/8 to 5/8)