what is the iron hammer and iron axe and iron knife do

You shouldnt double post tho, to earn credits or just because of the lag.. Anyways its just an item for now if im not mistaken.. DaMan hasnt added anything for it to the game yet so just save them for later.

Iron hammer is used in crafting, use it along with wheat to get flour. You can buy some from me, i have some extra ones, or from someone else. Click on your house, then the indoor button to craft items.
Iron Axe is for woodcutting, although that isn't added yet, and I think Iron knife may be either another item used in crafting or somehow related to mining, which too isn't added yet, but soon will be.
If you see your stats, you will see woodcutting and mining level. Iron axe can be related to woodcutting, and for mining, I think Iron knife will be used(although it is strange)