The Fang Blades were tools carried by Toa Hordika Matau. They were Aero Slicers warped by Visorak venom. They helped him cut through a number of things, including webs (which were a common sight in Metru Nui due to the Visorak invasion), and could also charge his Rhotuka Spinner. Matau lost these when he was transformed back into a Toa Metru.