The shape and composition of the find point to a fulacht fia, one of the most common prehistoric monument types in Ireland, yet one that remains poorly understood. These sites typically appear as horseshoe-shaped mounds of fire-cracked stone, the residue of a cooking or industrial process that involved heating stones in a fire and dropping them into a water-filled trough to bring it to the boil. Hundreds of experiments have confirmed the method works efficiently; what people were actually doing with the boiling water, whether cooking large quantities of meat, processing hides, or something else entirely, is still debated.

What makes Giltspur quietly notable is not just the find itself but its setting and its company. Fulachta fia tend to cluster near water sources, and a north-east facing slope retaining moisture would have suited the purpose well. More striking is that a second possible example was identified roughly fifty metres to the west. Two sites in such proximity raises the possibility that this stretch of ground saw repeated or sustained use, though without excavation it is impossible to say whether both features are contemporary or separated by generations of activity.