SECURITY One-way pan head screw Stainless steel A251667
SECURITY One-way pan head tapping screw Steel Zinc plated26910
Hafren SECURITY One-way countersunk head woodscrew Steel Zinc plated25760
SECURITY One-way pan head tapping screw Stainless steel A251668
SECURITY One-way raised countersunk head tapping screw Stainless steel A251671
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.