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Used for 4" cutting machine, 107x1.2x16mm size, one of the best selling sizes in Asian market, used for cutting metal and steel, good sharpness makes it easier for customers to work.
link:https://www.delunabrasives.com/cutting-disc/metal-cutting-discs/metal-cut-off-wheel-for-angle-grinder.html
Metal Cut Off Wheel for Angle Grinder