CNC Machined M10 Billet Flange Nuts are lighter and stronger (not to mention much better looking!) than your original.
On Ducati's and MV's With a single sided Swing arm (998, Monster 1100, Etc) These Are for attaching the Hub flange (the Pretty part that connects your sprocket to the Axle) to the Cush drives.
For M8 nuts to Attach a Quick change Ring gear Sprocket to the Quick change carrier (FC212) use DA385
On the 749 / 999, Monster 797, and Scrambler models And the Aprilia, these hold the Sprocket Directly to the OE Cush drives (no Flange on these bikes)
On Some 2018+ Brutale and Dragster 800
models use these Nuts and
Some 2018+ models do not. You will need to verify what you need
Before ordering - if your flange has the 5 large nuts sticking out of it, then these are the ones you want. if it is smooth with Small nuts on the sprocket only, then you dont need these