Flint barbs to iron bodkins — which arrowhead is in your hand?
Arrowheads span ten thousand years, and material sorts them first. Flint: leaf-shaped points are Neolithic, barbed-and-tanged points Bronze Age, tiny transverse and petit tranchet forms in between. Bronze: socketed, often trilobate heads belong to the later Bronze Age and, in Scythian and Greek lands, the Iron Age. Iron: from the Iron Age through the Middle Ages.
Medieval iron heads divide by job: broad barbed hunting heads for soft targets; narrow, stiff bodkin points for punching mail and plate; and the socket versus tang distinction matters for hafting and date. A heavy socketed head over ~15 mm across may be a crossbow quarrel instead.
Measure length, maximum width, and socket diameter, and photograph the silhouette square-on — outline is the identification. Beware modern replica flint points (knapping is a living hobby) and corroded nails masquerading as bodkins; when in doubt, record honestly and ask the board.
Identifying arrow and spearheads
Identifying swords and daggers