- Palatal. - Circuit breaker with click anti-return system For safe and effective palatal disjunction using a fixed device. - Perfect locking of the screw throughout the active phase of the treatment. - Locking by stopper preventing dislocation of the screw at the end of the treatment. - Activation / deactivation secure the screw through the characteristic click every 1 / 4 -turn. - No risk of involuntary return when activating by removing the safety key. - Laser marking of the direction of opening and maximum expansion on the screw body. - Screw body 12.8 mm. - Material stainless steel. - Maximum expansion 10.0 mm. - 4 x 1 / 4 turn= 0.8 mm. **For further product information , please contact Chat Support**