The study evaluated metacarpal shaft fractures treated with a stylet of 18–20-gauge spinal needles as an intramedullary elastic nail and K wire by measuring hand functions after fracture union. Range of motion, clinical, and radiological fracture union were assessed at 6 weeks and monthly until 6 months. Michigan's Score evaluates results. The spinal needle's flexibility and tensile strength permitted more fracture micromovements than a K wire. Wrist joint ROM was similar except for extension. Stylet-treated patients extended their lives more than K-wire-treated individuals.