Removing anti-theft screws from number plates often requires specific tools and techniques depending on the type of screw used. For one-way anti-theft screws, which are commonly used for this purpose, a special removal tool is typically necessary.
Understanding One-Way Anti-Theft Screws
As the name suggests, one-way anti-theft screws are designed to be easily installed but difficult to remove. The unique shape of their head allows them to be driven in only one direction.
- Fastening: You can fasten one-way screws using a standard flat-bladed screwdriver. The screwdriver bites into the slot and allows you to turn the screw clockwise to tighten it.
- Removal Challenge: The head's design prevents a standard screwdriver from gaining purchase when turned counter-clockwise. This is because the shape of the head means the screw can only be turned in one direction for fastening.
Methods for Removing One-Way Anti-Theft Screws
Based on their design, the primary method for removing one-way anti-theft screws is using a dedicated tool.
- Special Removal Tool: The most effective way to remove one-way screws is by using a special removal tool. These tools are specifically designed with prongs or fingers that grip the outer edge of the screw head, allowing you to apply torque in the counter-clockwise direction needed for removal.
- Alternative Techniques (Use with Caution): If a special removal tool is unavailable, other methods might be attempted, but they risk damaging the number plate, the vehicle, or the screw head:
- Screw Extractor Kit: A screw extractor (or easy-out) kit can be used. This typically involves drilling a small pilot hole into the screw head and then using a hardened extractor bit that grips the inside of the hole to unscrew it.
- Cutting a Slot: In some cases, a rotary tool with a cutting disc can be used to carefully cut a new straight slot across the screw head, allowing a standard flat-bladed screwdriver to be used. This is difficult and carries a high risk of damage.
- Vice Grips: If the screw head is proud enough, you might be able to grip it firmly with small vice grips and slowly turn it.
Important Note: The reference specifically highlights that one-way anti-theft screws require a special removal tool to take them off due to their design. Attempting removal with standard tools is ineffective for these specific screws and can cause damage.
When dealing with anti-theft screws on number plates, identifying the type of screw is the first step. If they are the one-way type, obtaining the correct removal tool is the recommended and safest approach.
