Universal Applicability designed to be used in all standard 4 inch or 4 1/2 inch angle grinders with 5/8 inch arbor, it also comes with a reducing bushing, which can reduce the bore diameter from 7/8 inch to 5/8 inch to fit M10 angle grinder shaft. People complained that the old version of the grinder wheel was too small to fit the 1.61 inch size flange nut. To fix this problem we enlarged the center hole diameter of our wood carving disc, now it fit all kinds of flange nuts in the market. The wood carving disc is made of carbon steel, with a strong structure, is not easy to break and deform, long service life, to meet your needs. Provides rapid material removal, especially for convex and concave areas. Our wood carving wheel can make rapid removal and shaping, great for curved work; consists of hundreds of extremely teeth that remove stock and outlast hundreds of sandpaper pads. Should only be used on non-metals or non-metal materials, suitable for wood, plastic, and other soft materials. Ideal for grinding, carving, shaping, and any other DIY woodwork. Material: Metal colour: gold Package Contents: 4 x 22mm wood carving 1 x 16mm wood carving 1 x silver reducing bushing 1 x adjustable lock-nut 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.