This is the best method of repairing your netherite tools. This is best utilized when you have enchantments or improvements on your tools that you don’t want to lose. You’ll need either 2 of the same tool or netherite ingots. Since netherite ingots are a challenge to get, the best time to do this is right before your tool breaks. You can use a pristine and undamaged item to repair your almost broken tool or you can use 4 ingots.

The item on the left is the target item and the item in the space to the right is destroyed. [1] X Research source

You’ll need 2 of the same netherite tool. Their durability will combine and get a 5% repair bonus to give you one item.

For example, you can use 2 damaged netherite axes to repair each other and make 1 netherite axe. This could be beneficial if you have limited inventory space, as it turns 2 non-stackable items into 1 item. [2] X Research source

This is similar to using the crafting table where your tools will lose any enchantments or improvements.

For example, you can use 2 damaged netherite axes to repair each other and make 1 netherite axe. This could be useful if you have limited inventory space, as it turns 2 non-stackable items into 1 item. [3] X Research source