Unbreaking

Unbreaking is an enchantment that gives a chance for an item to avoid durability reduction when it is used, effectively increasing the item's durability.

Unbreaking can be obtained from enchanting tables, drops from mobs that have spawned in a raid,‌[Bedrock Edition only] books obtained by fishing, monster room chests, librarian villagers, and non-village structure loot.

For tools and weapons, there is a 100%÷(level+1) chance that using the item reduces durability, which means that the item has a 50%/66.66……%/75% chance of not using any durability. On average, tools last 2/3/4 times as long.