Although regular swords do not exist in GGO, this weapon was crafted with the «Bayonet Creation» skill, a high-level version of the «Knife Creation» skill, using the best metal in the game: Galactic Warship's Plate Armor. The material is so strong that it can clash with the «Kagemitsu G4» while only suffering light burns.
Due to the system limit imposed on the skill used to create this weapon, it is at the limit for length and weight.
After the destruction of the «Accuracy International L115A3» by Sinon's «PGM Ultima Ratio Hecate II», Sterben pulled the estoc from his broken rifle and used it to engage in close quarter combat against Kirito and his Kagemitsu G4. As the weapon was shaped similarly to an estoc, Sterben was able to use its speed to rapidly strike Kirito by imitating a high level Rapier Sword Skill, «Star Splash», without the system assistance.