Hello dear buyers, This is Rita from China. We are abrasive discs manufacturer for more than 20 years. We produce Cutting disc, Grinding disc, Flap disc, used for metal steel and stainless steel finishing. Function: Fast cutting, Grinding and deburring, Surface polishing Use for: Metal, carbon steel, stainless steel, INOX, cast iron. Install on: Grinder, Portable cutting machine, Stationary cutting machine Cutting disc diameter: 4" 4.5" 5" 7" 9" 10" 12" 14" 16" Grinding disc diameter: 4" 4.5" 5" 7" 9" Flap disc diameter: 4" 4.5" 5" 7" Abrasives material: aluminum oxide Bonding agent: resin Reinforced: fiberglass, black paper, fabrics Type: 41, 42, 27, 29 Shape: flat, depressed center Linear velocity speed:80m/s Colour: black or others Standard: En12413/ISO Brand Name: KEENDEE OEM service: available Origin Place: China