For mid-palatal suture separations by means of fixed appliances.• built-in stops prevent the screws from coming apart once maximum expansion has been obtained• small dimensions with maximum expansion• solder free• break resistant retention legs, stable guidance throughout complete expansion• the integrated spindle friction prevents unwanted turning back• permanently laser marked arrow on the body of the screw indicates the opening direction and max. expansion• screw can be tied down once desired expansion has been reachedwith safety keyScrew body: 9.4 mmMaximum expansion: 7.0 mm4 x 1/4 turn: = 0.8 mmMaterial: Stainless steel