Most banjos, mandolins, and bouzoukis have flat fretboards. If you’re not sure about yours, chances are it is flat.
 Our model 5 capo — “for Banjo” —is 1.5″ wide, and it also fits most mandolins and bouzoukis, many tenor guitars, and other instruments with narrow fretboards.. The model 5 capo is available in these various styles:
Available for both flat and radiused fretboard. Most of these instruments have flat fretboards; if you’re not sure about yours, chances are it is flat.