The Aero Slicers were ToaMatau Metru's Toa Tools. He could use them to channel his elemental power of air. He could also engage in Melee combat with them. They were mutated into Fang Blades when he became a Toa Hordika. He received them later when he was turned back into a Toa Metru by Keetongu. He has now lost them permanently because he is a Turaga.