The Ultimate Minecraft Tool Guide: Craft, Mine, and Conquer

To make your gear last forever in Minecraft, you must obtain and apply the Mending enchantment, as it allows your items to infinitely consume experience (XP) orbs to restore their durability. While traditional repairing methods on an anvil will eventually block you with a “Too Expensive!” message, Mending completely bypasses this mechanic. The Core Mechanics of Durability

Every tool, weapon, and piece of armor in Minecraft has a specific durability pool determined by its tier. Minecraft: Guide To Tool and Armor Durability – TheGamer