It is not a dolmen, though it resembles one at a glance. It is a coffin-resting stone, a type of informal monument found at intervals along old funeral routes in Ireland, where bearers would set down a coffin to rest during the long walk to a burial ground. This particular stone measures roughly 1.7 metres long and just under a metre wide, raised to a height of about 0.65 metres, with two of its supporting stones fitted with additional pad stones to level and stabilise the surface.

Local tradition holds that coffins carried to the burial ground at St. Feaghna's Church were laid on this stone during the journey, sometimes remaining there overnight. The old Glengariff to Kenmare road, now disused, passes a short distance to the northwest, and it was almost certainly along this route that the funeral processions travelled. The practice of resting a coffin at a fixed point was not simply practical. In many parts of Ireland it carried religious and communal significance; mourners might pray at the resting place, and the spot itself could accumulate a quiet, enduring sanctity. The stone at Milleens sits in rough pasture among rock outcrops, which gives it a setting that feels less like a managed monument and more like something the land simply absorbed over time.