Bone File - Double-EndedDDP Elite USA Bone File is a highly versatile instrument that can be used in a vast array of surgical procedures. This file is double ended and is cross cut. The small paddle style blades allow it to be used near delicate tissue areas as are common in neurosurgical procedures and not cause trauma or injury by puncture wound. Additionally use of this file on jagged bone breaks or cuts or even on rough hard surfaces aids in the protected of