Duro D230-22.2-ADMI-6.0 Steel & Inox Discs with Depressed Centre 230mm / 9\" x 6mm x5 Pcs This x5 piece set of Duro depressed centre grinding discs gives high performance when using angle grinders on all mild carbon steel and stainless steel types. FEATURES A30BF Inox Duo Specification Depressed centre - for grinding 80m/s maximum speed 3 reinforcing layers Coated aluminium oxide - free of FE, S & CL <0.1% - EN12413 SPECIFICATION Part Number: D230-22.2-ADMI-6.0 Diameter: 230 mm / 9\" Bore: 22.23 mm Thickness: 6.0 mm