RPE screw of titanium For rapid palatal expansion by means of fixed appliances. The screw is anchored to the teeth using cast titanium and laser-welded cap splints, laser-welded titanium bases (REF 799-210-00) or alternatively using acrylic cap splints fabricated from Orthocryl® acrylic. Packs (1 piece / 50 pieces) with 1 safety key, pack (10 pieces) with 10 safety keys. Screw body: 14.4 mm Material: titanium Maximum expansion: 12.0 mm Retention legs: straight 4 x 1/4 turn= 0.8 mm