Not my best effort, but this explains just what the tool does and why it works.
Removes lock cylinders from numerous BMW cases when you want to re-key them.

Classic Cycle Connection
1971 R75/5 roadracer
1973 Kawasaki Z1 roadracer
1976 BMW R75/6
1976 Triumph 750 Bonneville
1999 BMW R1100RT
2007 Kymco People 200S