• built-in stops prevent the screws from coming apart once maximum expansion has been achieved
• small dimensions with maximum expansion
• break-resistant retention legs and stable guidance throughout complete expansion
• the integrated spindle friction prevents unwanted turning back
• laser-marked arrow on the body of the screw indicates the opening direction and maximum 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.