Diamond Grille Security Screens are a popular and economical solution to provide a physical barrier designed to discourage intruders from your home. The ideal entry point for reliable home security. Our security screens and doors are high quality, manufactured from extruded aluminium to conform with Australian Standards. Screwed Diamond grille is fixed with high tensile screws into a deeper reinforced frame, engineered to absorb a number of impacts and to prevent the grille coming away from its frame.