Professional M14 quick-release clamping nut for angle grinders for all common devices (DeWalt, Bosch, Makita, Metabo, Extol and others). Easy change of sanding disc or cutting disc without assembly key. The clamping nut is particularly suitable for angle grinders with a power of less than 1000W with a disc diameter of 115、125、180、230mm and for the attachment of flap discs.