ForceDefender Security Window Systems... GlassLock's ForceDefender windows and doors offer the finest and   most flexible architectural solutions to your security fenestration   requirements. They come in primary and secondary versions, fixed   or operable, with a customizable finish. They have been tested to   meet an ISC/GSA Performance Criteria Level 2 as-well-as provide   Radio Frequency (RF) attenuation and electronic eavesdropping   countermeasures. Our new, energy efficient, low profile secondary windows provide a   low cost security glazing solution to meet historical and   architecturally significant requirements. These secondary windows   are available in a fixed or operable configuration. The operable   window is designed for easy access to the primary window for   cleaning and maintenance.   Connect with us:     ForceDefender Security Window Systems: - Primary Windows -  Doors - BlastBlinds - Store-Fronts - Catch-Bar Systems - Catch-Cable Systems - Ballistic Resistant Windows - Mullion Reinforcements - Custom Masonry Anchors   Site Map | Videos Blast Protection and Physical Security: Incorporated into new construction or as a retrofit solution, the ForceDefender product line meets the challenging requirements demanded by today's security professionals and design engineers. About Us | View Videos