Final answer:
Penfield dissectors are the neurosurgical instruments that come as numbered sets and are used for delicate tissue dissection and lesion removal in neurosurgery.
Step-by-step explanation:
The neurosurgical instruments that come as numbered sets frequently used in neurosurgical procedures are Penfield dissectors. These are specialized tools utilized by neurosurgeons to delicately dissect and separate soft tissues and remove lesions in the brain and spinal cord. Penfield dissectors come in a variety of sizes and are numbered to indicate their size and shape for precise surgical application.