Haverfield-Scoville Hemilaminectomy RetractorDDP Elite USA Haverfield Scoville Hemilaminectomy Retractors are suitable for use in neurosurgical procedures in which it is necessary to retract soft tissue layers. These retractors are designed specifically for use in hemilaminectomy procedures in which half of the vertebral arch is cut and removed. This instrument features two hinged arms that can be repositioned and the width adjusted up to a maximum spread of 5". It is available as the frame only