The Netherite Tools are harder than the diamond tools and all of them have different uses in the game. The tools can even resist against any kind of fire or lava.
To make the Netherite Tools, the first thing you need to do is to craft the diamond tools.
Chop down the tree to get a wooden log, then move downstairs and collect the pieces of diamond. Head towards the crafting table and craft wooden plank using the wooden logs on the crafting grid. And then use these planks to craft wooden sticks.
Now you can craft the diamond tools by using the diamond pieces and the wooden sticks. Place them on the grid according to the shape of the tool that you are going to craft.
For example if you want to craft diamond hoe, you need to place two wooden sticks and two diamonds on the 3*3 crafting grid.
Take 5 pieces of Netherite ingot and go to the smiting table. The first tool we are going to make is the Netherite Hoe. Use your diamond hoe and one piece of ingot to craft the Netherite Hoe. After crafting, take that in your inventory.
The next tool is going to be the Netherite Shovel. Use one piece of netherite ingot and your diamond shovel to craft one.
Follow the same method and use your diamond axe, pickaxe and sword with a piece of netherite ingot to craft netherite axe, pickaxe and sword respectively. This will complete the full set of netherite tools and you will be able to use them for different purposes.