Quick Release Angle Grinder Flange Locking Nut. Amazing super fast tool less change over seconds! Enabling the user to change a worn disc to a new disc without any tools. Saving you time and money! For All M14 Thread Mini And Angle Grinders 115mm To 230mm Features No need for Spanners - Just Hand Tighten Allows users to change the disc/blades or other accessories on your grinder in seconds With integrated keyholes, for removal of the nut with a standard pin spanner in the event of the nut becoming too tight.