Known locally as St. Brigid's Flag, it covers the opening of a holy well dedicated to St. Brigid, and its upper surface is marked with numerous crudely inscribed crosses. The slab measures roughly 1.9 metres by 1.4 metres, large enough to shelter the well beneath it entirely. What makes it quietly remarkable is this layering of function and devotion: the stone is simultaneously a practical cover, a votive object, and a surface that generations of people felt compelled to mark.

Holy wells in Ireland occupy a particular place in the country's religious landscape, predating Christianity in many cases and absorbed into it over centuries. They became associated with particular saints, and St. Brigid, one of Ireland's most widely venerated figures, lent her name to a great many of them. The crosses scratched into the flag at Dromard are described as crude rather than formal, which suggests they were not the work of skilled craftsmen but of ordinary people making an act of devotion in the simplest way available to them, pressing a sharp edge to stone and drawing a cross. The accumulation of such marks over time gives the slab a quiet intensity that a single carved inscription could not.