Material: Stainless steel
- with cone-shaped expansion screw holder
- skeleton design
- version: extra strong, with larger screw body
- holes in body of screws for better retention in acrylic
- built-in stops prevent screws from coming apart
With expansion screw key, standard (straight, small).
Indication: for transverse expansion in the maxilla and bimaxillary functional gnatho-orthopedic appliances