Board Thread:Fun and Games/@comment-36708952-20180825123644/@comment-33628324-20180826194354

"Durindana Spada: Ultimate Unbroken Sword (不毀の極剣, Fuki no Kyokken?) is Durindana with its hilt in its shortened state. Namely, Hector is the original owner of this Noble Phantasm. Roland owns what was known as the "Ultimate Unbroken Hallow". Because there are no holy relics in the handle, it is limited as a simple Noble Phantasm that just does a large amount of damage." <-- FGO Material

https://typemoon.wikia.com/wiki/Fate/Grand_Order_material_II#Fate.2FGrand_Order_material_II

"Originally the sword of Hector, he converted it into the spear Durindana, and after it later lost its features as a spear, it became Durandal"

https://typemoon.wikia.com/wiki/Durandal

"The Noble Phantasm he uses is Ultimate Unbroken Spear (Durindana). Hector extended the handle of this sword, preferring tactics of throwing it as a spear. Said spear was extolled as piercing through anything in the world. Later, it would lose its features as a spear and become the peerless sword Durandal."

It is literally stated in hectors Bio.