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. 
For All M14 Thread Mini And Angle Grinders 115mm To 230mm

No need for Spanners - Just Hand Tighten
Allows users to change the disc/blades or other accessoires 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.

Quick Release Angle Grinder Flange Locking Nut.
Standard M14 Thread