Grooved spindle for knob / lever sets (8 mm) / (9 mm)

For knob / lever sets with knobs with M12 thread.
The spindle is screwed into the grip plate / knob and
is tightened with a wrench SW14. The fixing is carried out by a "set screw-headless with punch". Here the punch cuts into the groove.
Positioning necessary!

Further lengths on request.