These blades designed by Yakup Avşar are used under video-endoscopy. Hump reduction-rasping, medial osteotomy, Aufricht triangle modification, transverse and lateral osteotomies are performed with the aid of these blades. Split-thickness osteotomy is a surgical method in which an incomplete cut is made on the lateral nasal walls keeping the stability of bony nasal vault. This method was first introduced by Dr. Avsar and is a consequent advantage of this technology.