The Miner Pickaxe dig a 2x2x1 hole. It has the texure of the Netherite Pickaxe.
The Molten Pickaxe dig a 3x3x2 hole. (It has the texture of enchantment because later there will be a Lava Pickaxe)
The Water Pickaxe dig a 3x3x3 hole.
The Anvil Pickaxe dig a 2x2x2 hole.
