Fits smallest of the Mid-East Harps, including the Lily Harp (TM) (HLLA), the Mid-East Lyre Harp (HLRT) and the smaller specialty harps such as the Mid-East Lyre Harp, 8 String (HLRE)
Measurement of square hole at end of shaft: 4 Square Sides: .16 inches; Diagonally Across: .2 inches