For larger harps try the Harp HPTN, Tuning Tool, Medium.
Measurements for Square Hole at End of Shaft:4 Square Sides: .16 inchesDiagonally Across: .2 inches
NOTE: This item may NOT be shipped outside USA. May contain wood species (Dalbergia - Indian rosewood) identified by CITES as endangered wood species. Contact Customer Support for export verification and additional information please - Click Here