For Fabric Let me guess, you came here because you accidently broke your OP pickaxe with 1253125123 enchantments on it, so you searched google for a mod that would let you fix that.
Well, here you go.
By the way, the enchantment is labeled as Indestructible ingame to distinguish from Unbreaking.
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FAQ Q: Will you port this to future versions? A: Definitely.
Q: Config? A: Why? If you want the tool to have reduced damage, but not completely invincible, go back to Unbreaking III.
Q: Can I use this in a modpack? A: Sure.