A full wiki going through the features of the mod can be found here.
Extra Shields is a vanilla+ expansion to shields. It adds various new shields inline with the vanilla armor system and shield plating upgrades and also includes new and improved enchantment support.
Extra Shields has been carefully crafted to ensure it remains inline with vanilla progression.
Check out More Shield Variants's Compatability Add-on, it works well with Extra Shields.
Each material in vanilla now has a shield variant! You can also plate these shields to increase the durability at the cost of a longer cooldown if you're attacked with an axe.
!Shields and their Plating items.
The shield repair kit can be used to quickly repair your shield whilst in combat, be careful though, as using a repair kit will permemantly reduce the total durability of the shield it's used on.
For more information on crafting recipes, take a look at the following wiki pages:
Crafting recipes are also visible in EMI (1.21.1) and RRV (1.21.8+)
All of these enchantments have been tested and balanced extensively, some are not compatible with others.
For a more in depth look into enchantments and their incompatibilities, take a look at the wiki.

A vanilla+ expansion to shields. Adds various new shields inline with the vanilla armor system and shield plating upgrades. Includes new and improved enchantment support.