This is a Backport of Simple Unbreakable Tools to 1.12.2 version! (Author gives this possibility on the mod page)
Gkoliver is original author of Simple Unbreakable Tools(1.15-1.16+)!
What this mod does?
It makes so, that your weapon, your tools and etc will be Unbreakable!
All modes, that uses custom durability, instead normal one(Electroblob's Wizardry mana, FE related mods as example) should still give you troubles :))
My discord server:
https://discord.gg/2gav6GD
Simply Unbreakable Team
Owner
