double-ended, plain serrations, 6.0 mm & 5.0 mm wide ends, 7″ (17.5 cm) Bone File #45 is an instrument crafted for use in neurosurgical orthopedic procedures. It features a hexagonal body that also serves as a grip that makes it easy to handle manually. This file is double ended and features plain serrations as well as two different sized ends: 6.0 mm and 5.0 mm. This instrument can be useful in surgical procedures that require filing or reshaping of bone particularly to prevent damage to surround tissue. Ideally it can be used to protect delicate brain tissue and neurovascular bundles from sharp jagged edges from breaks or from cuts made in surgery.