What are Bifix caps? Bifix Caps are low profile, high-quality mouldings, that are easy to use, and are available in 96 stock colours. The unique stem (comprising 16 micro-wings) makes Bifix Caps the ONLY 'pozi' caps that: work in both Phillips & Pozi screws - hence the name: Bi- Fix can grip in out-of-tolerance drive-recesses have been awarded a patent With 96 stock colours, Bifix caps can match nearly all major laminates (solid colours, woodgrains and patterns) used in the UK - making Bifix caps a very cost-effective way to not just cover - but really hide your fixings from sight.