• the retention legs can be angled near to the screw body
• built-in stops prevent the screws from coming apart once maximum expansion has been obtained
• break-resistant retention legs, stable guidance throughout complete expansion
• offset body for earliest possible angling of the retention legs
• 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 reached

Packs (1 piece / 50 pieces) with 1 safety key, pack (10 pieces) with 10 safety keys.