Roungers are also used by neurosurgeons. These instruments are used to chip away, cut or crack a hard tissue or bones. These tools come in a variety of shapes and generally have tips which are sharp and curved. This makes it easier for the bone to be scraped out. There are a variety of rongeurs which are used in neurosurgery. Some of these are Colclough Rongeur, Spurling Rongeur and Oldberg Laminectomy Rongeur. These have different shapes and are hence used for various purposes however they are all based on the same premise.