The grinder wheel disc diameter is 4 inch(100mm)and arbor is 5/8 inch(16mm), so this size can fit all the angle grinder in the market. The wood grinding wheel can be used for shaping, profiling, carving, notching, flattening and grinding of wood, softwood and hardwood, chipboard, laminate and even plastic. Should only be used for non-metallic materials. This wood cavring disc is made by premium titanium steel which has the higher hardness and longer life. The angle grinder disc is made of tungsten carbide, durable and wear resistant. The wood carving disc is not easy to break or deform due to sturdy construction. This wood shaping disc can be used for wooden materials,grinding,carving and any other DIY wood works The wood carving disc is curved and lets you effortlessly level the high spots or adjust the uneven surfaces in a few fast passes Depend on the special thorn design,this grinding wheel is powerful and more efficient than other grinding wheels. This wood shaping disc can be used for wooden materials,grinding,carving and any other DIY wood works