M54 system intermediate rings (tuning rings), available in the strengths
0.3mm (black), 0.5mm (red), 1mm (gold).
Very thin extension rings for fine tuning in the M54 system
Insert rings with M54 diameter without thread.
Fit between any M54 screw connection, corresponds to approx. 2/5
(0.3mm), 2/3 (0.5mm) or 1 1/3 (1mm) thread turn. The information
to thread rotation may vary slightly.
Prevents an M54 screw clamp from getting stuck