Invisifold....

The Invisifold System is designed to convert standard welded windows and doors into sliding/folding/swing systems. This is the most Systems House and fabricator friendly sliding product range ever designed.
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The simplicity of the design has amazed all who have seen it. There are NO visible hinges and NO visible hardware - just a simple handle on the main door. By replacing the original gearing with the Invisifold components an incredible new world of possibilities opens up!