IPeghead

Returned by PegheadApi — a peghead setting on one mother gem. Adds only setters to IGemSetting; each regenerates the peghead in place (same Guid), millimetres:

Member	Meaning
SetProngs(prongs)	Prong count — negative counts select the rotated variant (-4 = 4 prongs at 45 degrees)
SetHeight(height)	Height, mm
SetThickness(thickness)	Prong thickness, mm
SetGirdleWidth(girdleWidth)	Girdle width, mm
SetOverGirdleHeight(overGirdleHeight)	Height over the girdle, mm
SetGemInside(gemInside)	How deep the gem sits inside, mm