M8 x 12mm Clutch Head Round Security Screws - A2 Stainless Steel - Box of 100 Clutch Head Round Head Security Machine Screws, feature a rounded head and a one-way security drive. 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.  The clutch head drive is the original one-way security drive and is rated Security Level 4. Click Here to view the installation video.  These clutch head security machine screws are made from A2 Stainless Steel which provides corrosion and oxidation resistance. For larger quantities or items not listed, please email and one of our team will provide you with a quotation. M8 x 12mm Clutch Head Round Security Screws - A2 Stainless Steel - Box of 100