<prompt> The given below instrument is used for:For cutting ribs in spinal surgeryFor smoothening of the edges in amputation surgeryUsed as nibbler and remove fibrous tissue from non-union siteTo hold the hard tissues  <response>: Ans. c Used as nibbler and remove fibrous tissue from non-union siteRef: Textbook of Orthopedics 4th Ed by John Ebnezar; Page No- 861 It is a Double-action bone nibbler Rounger. The double- action nibblers are mechanically superior. Bone nibbler is available in various sizes and with different angle of the nose. Curved nibbler - use for spinal surgery Straight nibbler -general use Double action nibbler - straight or curved. 