8. High security hinges Commonly seen as a weak spot to the would-be intruder, the unique high security hinge is fixed to both the vertical and horizontal axis of the PVCu. Coupled with this, the metal end-cap has been designed to guide the locking point into place providing a firm weather-tight seal and a barrier to forced entry time after time. All hinges are tested to over 20,000 cycles (the equivalent of 55-years use) and meet the requirements for BS 7412 for corrosion resistance, so high performance is guaranteed.