The main advancements in neurosurgery came about as a result of highly crafted tools. Modern neurosurgical tools, or instruments, include chisels, curettes, dissectors, distractors, elevators, forcepts, hooks, impactors, probes, suction tubes, power tools, and robots.Most of these modern tools, like chisels, elevators, forcepts, hooks, impactors, and probes, have been in medical practice for a relatively long time. The main difference of these tools, pre and post advancement in neurosurgery, were the precision in which they were crafted. These tools are crafted with edges that are within a millimeter of desired accuracy. Other tools such as hand held power saws and robots have only recently been commonly used inside of a neurological operating room.