The Tamperproof Screw Company was founded in the late 1970s when George Friedman developed the Phillips Pin-Head security screw. It consists of a traditional Phillips drive with a tamper-resistant pin added for security. Prevents unauthorized tampering with the screws. The Philips/Cross tamperproof profile has the same properties as the classic Philips/Cross; the difference is that the tool has a hole located in the tip and the screw head has a small central pin.
Advantages and Disadvantages of Phillips Pin-Head
Theft Proof fasteners are virtually impossible to remove without the matching driver. These screws are easy to drive & remove with matching tool. Also cannot be removed with Phillips Screwdriver. Available in sizes #1, 2, 3.