NORTON 300 X 50MM 46-GRIT MEDIUM GREY ALUMINIUM OXIDE GRINDING WHEEL. ® Grey Aluminium Oxide Grinding Wheels are suitable for general purpose grinding applications of steel and other ferrous metals.They are suitable for use on stationary Bench Grinders and Pedestal Machines. Wheel Diameter: 300 mm (12). Bore Diameter: 38.1 mm (1-1/2). Abrasive Grit: 46G - Medium. Recommended PPE (Personal Protective Equipment). This item is in the category "Home & Garden\Tools & Workshop Equipment\Power Tool & Air Tool Accessories\Abrasives\Grinding Wheels & Cut-Off Wheels". The seller is "ozdiam" and is located in this country: AU. This item can be shipped worldwide.