System Zero security screws utilise an external non-slip drive head with indentations which the matching security tool grips in order to fasten and remove.
Have got some of the above screws in my Virgin Media box I need to remove ( thank you Google). Don't really want to fork for a bloody.
I think the screw's about mm and is a smooth dome - a bit like the ones in . " System Zero" looks the job, but £ (+P&P) is, as you say.
Telwest haven't existed for years! This thread implies it is a "system zero tamperproof screw" and has some ideas about how to remove it.
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Products - of Browse our range of Security Screws in a range of Drive Types, Sizes, Materials and Finishes. Offering additional BrandSystem Zero.
The tamper resistant System Zero dome head security screw has an external components, requiring a special insert bit or key wrench to insert and remove.