Spinal Internal Fixation Medical Instrument Kit 1. All tools for Spinal Internal Fixation Surgery in. 2. Professional. Spinal Internal Fixation Medical Instrument Kit1. All tools for Spinal Internal Fixation Surgery in. 2. Be Made of Stainless Steel. 3. Tools contains of Guider, Spanner, Screw Tap, Drill bit, Screwdriver and