During the Council in The Lord of the Rings, it was decided that Frodo would take Sauron’s Ring to Mordor and destroy it in the fires of Mount Doom. Everyone present understood that this task would be nearly impossible.
To increase the chances of success, Elrond and Gandalf approved the formation of a group of travellers to accompany and protect Frodo. The Fellowship of the Ring included nine members in total, representing the major races of Middle-earth: Elves, Dwarves, Men, and Hobbits.
Each member of the Fellowship had a strong reason to take part in the quest, and each brought unique strengths. Aragorn, for instance, was the heir to the throne of Gondor and a skilled warrior. Legolas was one of the finest archers in Middle-earth, while Gimli was a master of the axe.

However, it was the Dwarf who held a special status — he was actually the strongest member of the Fellowship.
The Strength of the Dwarves in The Lord of the Rings
Eru Ilúvatar created Elves and Men, but Dwarves were not his doing. They were made by Aulë, the great smith among the Valar, who wished to pass on his craft to worthy students. So he created the Dwarves—strong, resilient, and passionate about working with stone and metal.
At that time, the world was full of chaos. Thus, Aulë made the Dwarves tough and unyielding, capable of withstanding any danger.
How the Dwarves Nearly Faced Extinction
The first Dwarves Aulë created could only move and act while he focused his thoughts on them. What’s more, Eru Ilúvatar had not blessed their creation. He was angered by Aulë’s actions, and the smith, repentant, was prepared to destroy his creations. But Eru relented and granted the Dwarves true life.

When their time came, they awoke and established their kingdoms, devoting themselves to stonework and metalcraft. Yet their incredible strength remained—and it proved vital to Gimli during his most important mission.