The Shards of Narsil, as senn in the film

The Shards of Narsil are another heridary item of the Kingdom of Arthedain. It is kept in Annúminás,in Ost Elendil

The sword Narsil was forged by Telchar, a dwarf of Nogrod,in the First Age. afterwards it was taken by the Edain to Númenor, and afterwards in has passed into the hands of Elendil.

The sword was broken in the War of the Last Alliance, however Isildur, son of Elendil has cut the ring from the hands of Sauron. The shards were taken to Imladris by Ohtar, and from there they were taken to Annúminás by Valandil.