Instead of shoulders, there are 4 longitudinal square slots on both parts of the body. They allow for correctly oriented soldering of a digitally designed custom laser-melted frame. The exclusive self-centering guide system, reinforced stainless steel of the male screw and guides and the optimal ratio between volume and dimensions. Ensures reliable treatment and perfect control of biomechanical expansion during the entire therapy.

Comes with:
- 1 stainless steel key
- 1 reinforced rotary key with handle