You are skilled in the art of doing wood work with only a knife or axe. You gain proficiency in the wood carver and carpenters tools. (If you all ready Have proficiency in them, you can add your proficiency modifier twice)

If you have a knife or hand axe in your inventory, you do not need wood carver or carpenters tool kits to do wood carving or carpentry. But it's done without your proficiency modifier.