SECURITY Tornillo de seguridad cabeza cilíndrica Acero inoxidable (Inox) A251667
SECURITY Tornillo "one-way" Acero Cincado26910
SECURITY Tornillo "one-way" Acero inoxidable (Inox) A251668
SECURITY One-way raised countersunk head tapping screw Acero inoxidable (Inox) A251671
SECURITY One-way countersunk head woodscrew Acero Cincado25760
The special ridged design of this drive means that it can only operate in a clockwise motion. Installed using standard slotted screwdriver - no specialist tools required.