Rotating Kerrison Shaft, 7″ (175mm) Bayonet, 4mm, 90° Up, Stainless Steel – Requires 70-2390 Micro Handle is a precision spinal and neurosurgical instrument component designed for controlled bone removal and decompression procedures. Featuring a rotating bayonet shaft, 4mm bite size, 90° upward-facing footplate, and premium stainless steel construction, this modular Kerrison shaft provides excellent surgical visibility, efficient bone resection, and enhanced maneuverability when paired with the compatible 70-2390 Micro Handle.