-Gentle bend for incisors and canines. For the removal of sub-gingival calculus and for the root cleaning. -Gracey curettes are the most popular and common, less traumatic than the Universal type. -They are site specific as they are designed and assorted to adapt to the specific area or tooth surface to be treated. -The blade of the Gracey curette is off set from the terminal shank at 70° and sharped only in one side. -Diameter 10 mm. -The Rigid type curette has a thicker and less flexible shank than a Standard Gracey. -Mostly used combined with a scaler for heavier calculus removal.