Wahl’s Ultimate Competition Series blade sets provide 2.5 times faster show quality cutting than the original Wahl Competition Series blade sets. Ultimate Competition Series blade sets are designed for smooth feeding that leaves no clipper tracks. They are made with hardened steel for durable and long lasting blades that stay sharp. The #8.5 Medium Ultimate Competition Series Blade which features a 3mm cutting length, which is designed to provide a smooth cut and show quality finish. This blade set fits all Wahl, Oster & Andis Detachable Style Clippers.