fireproof wood and wool (made with iron nuggets)

Reinforced logs, planks and sticks are the same but fireproof. they are made by putting an iron nugget above it in the crafting table. Note: you cannot turn reinforced logs into reinforced planks.

Metal wool is wool but fireproof. It is made by putting 4 iron nuggets next to wool. alternatively, you can put one iron nugget next to string to create metal string.

Reinforced bow: same as a regular bow, but more power and durability. it is made with reinforced sticks and metal string instead of sticks and string.

All of these items, except for the bow, can be put in the crafting menu to switch back to the normal versions. However, you don't get the iron nuggets back, except for the wool, in which you get two iron nuggets back.