RC3 aluminum anti-burglary windows with FB4 ballistic protection are a product that combines a high class of burglary resistance with excellent ballistic parameters, which makes it an exceptionally good solution for facilities requiring an increased level of security. The added value of RC3-FB4 windows is good acoustic insulation. Such high product parameters are achieved through well-thought-out design assumptions adopted for the construction of anti-burglary and bullet-proof window joinery: the use of multi-chamber aluminum profiles with additional reinforcements, multi-point premium anti-burglary fittings and bullet-proof glass integrated with additional laminated and tempered glass. Such design solutions have been tested in independent accredited laboratories both in terms of burglary resistance and resistance to bullets from firearms. The anti-burglary and bulletproof joinery is finished similarly to other profile windows and doors, providing RC3-FB4 windows with a high level of security without compromising aesthetics.