The Draper sanding disc is 150mm x 20mm with a medium coarse grit of 80g. With this wheel you also come with 5 reducing rings with bore sizes of 12.70mm, 15.90mm, 19.05mm, 22.23mm and 25.40mm and will fit most sanders. This is suitable for general grinding, deburring and sharpening tools, but only suitable for dry cutting. Like all Draper products, we have manufactured, tested and certified to the current standard EN12413:2019.