P-120 5 inch 8 Hole Sanding Discs Grind Paper Sanding Disc~2348 Specification Type: Sanding Disc Material: Aluminum Oxide Diameter: 125mm/ 5 inch Colour: Red Model: 120# (Grit) Number of holes: 8 Holes Suitable For: Ished metal, wood, jade and so on Features Widely applicable, ideal for polished metal, wood, jade and so on. Polishing stick plate supporting the use, easy and simple to use. How to use Sanding papers coated with aluminium oxide bound with synthetic resin are the perfect choice for Working of all wood, wood-based materials, and metal, from coarse sanding to fine sanding. 60 grain is used for coarse sanding of rough surfaces, 80-120 grain is suitable for surface Smoothing and sanding of small roughness, 180-400 grain is good for final fine sanding.