A surgical cutter for preparing recipient sites for square scalp plugs in hair transplanting has four disposable blades removably attached to the four longitudinal sides of a core having a square cross-section of predetermined dimensions corresponding to the width of each blade and to the area at the...http://www.google.se/patents/US4210145?utm_source=gb-gplus-sharePatent US4210145 - Surgical hole cutter for square hair transplant plugs
