The Neurosurgery Surgical Rotating Kerrison Shaft, 7″ (175mm) Straight, 6mm, 40° Up, Stainless Steel is a precision surgical instrument designed for controlled bone and tissue removal in neurosurgical and spinal procedures. Compatible with the 70-2390 Micro system, this durable Kerrison shaft provides excellent access, stability, and ergonomic control for demanding microsurgical applications.