PU material: This sanding pad is made of high-quality PU material, which is durable. The sanding pad of this material can ensure excellent smoothness of the sand disc and polishing effect, so as to achieve the effect of not hurting the user. Easy to use: this grinding wheel 8-hole sander has 3 built-in mounting screw holes and a shackle design, it makes installation faster and easier, and allows for quick sandpaper changes. Special design : This grinding wheel is designed with 8 holes to work with sanders with a dust collection system. This dust collection function of this thumb rest is super convenient, the 8 dust holes effectively attract dust and debris into the entire dust bag. Size of this sanding pad: Our sanding pad is 125mm in diameter and has 8 dust holes and 3 screw holes. Before purchasing, please make sure our sanding pad fits your sander. Sold by MSBD Store