Herugrim is described as a finely crafted sword, with a rich history tied to the royal family of Rohan. Its name, which can be translated to "Fury of the King" or "King’s Wrath," reflects the powerful legacy of the sword. 

The hilt of Herugrim is adorned with intricate designs, and it is said to be very well-balanced, allowing Theoden to wield it with great skill in battle. In The Two Towers, after Theoden is freed from Saruman's influence, he draws Herugrim to lead the Riders of Rohan into the battle at Helm's Deep, where it proves a symbol of his renewed strength and courage.

Herugrim is a symbol of Rohan's nobility and warrior spirit, and it is used by Theoden in several key moments during the War of the Ring. Its powerful association with Theoden’s leadership and heroic deeds makes it one of the significant swords in the lore of Middle-earth.