This is a skin for the Stone Hatchet item. You will be able to apply this skin when you craft the item in game.
The Stone Hatchet is a primitive, early game tool used for collecting wood and flesh. It is available to craft, costing only wood and stones. Players starting out may find great use of the Stone Hatchet along with the Stone Pickaxe to aid in their farming endeavors. Although it is much less efficient than the Hatchet or Salvaged Axe, it is still used commonly due to its low barrier of entry- not costing any processed materials which require a furnace.