The DEWALT DT43921 Metal Cut Off Disc is manufactured from professional aluminium oxide grain, designed for cordless tools to maximise life and performance. Ideal for use in general cutting work on stainless steel, ferrous metals and non-ferrous metals. With an extra thin kerf (1.2mm) for the perfect cut. Pack of 10 discs supplied in a storage tin. Specification: Diameter: 115mmThickness: 1.2mmBore Size: 22.23mm