What could be better than using the entire nut by consuming the whole fruit for food and getting creative with the shell! It acts as a natural abrasive without scratching surfaces. If you're unsure, it's best to try it on a small area first. It can even be used as a small sponge.
 
Size
3'' x 5.5'' (8 cm X 14 cm)
Material
Made from Grenoble walnut shells.