For Tightening and Loosening the Treble Buttons
of the Accordion / Diatonic Accordion
Stainless steel
Suitable for the following button sizes (Ø):
S..........9 / 9.5 mm
M........13 mm
L..........14 / 14.5 / 15 mm
XL........16 / 16.5 / 17 mm
(A) you can slide down to clamp the button (B)