[150mm Grinding Wheel]: Thickness is 20mm/0.8inch, the hole diameter is 12.7mm/0.5inch. [Two Grit]: One grit is 36 grit, the other is 60 grit. [Usage]: Suitable for use on ferrous metals and alloys. Fit for all 150mm bench grinders. [Application]: Widely used for general grinding and tool sharpening. [Note]: Professional installation is recommended. Diameter 150mm/6" Disc Type Grinding Wheel Grinder Type Bench Grinder Material Aluminum Oxide Brand Unbranded/Generic MPN W2D94669993898 EAN 4894669993898 Brand Unbranded/Generic MPN W2D94669993898 .