The armor refinements available from this category are for reinforcement, which lowers defense chance increase but allows the over capping of resists. There are 2 types of Ultima Online Armor Refinements, there's reinforced and deflecting.
- Invulnerability – Applies four modifications with a chance to apply five modifications.
- Fortification – Applies three modifications with a chance to apply four modifications.
- Hardening – Applies two modifications with a chance to apply three modifications.
- Protection – Applies one modification with a chance to apply two modifications.
- Defense – Applies one modification.