These units have been Focus group tested and have been proven to be operable without prior knowledge or tools. Primarily fitted as an after market device where access to the sash is difficult. This type can also be installed as a Factory fitted device to avoid interruption of assembly lines.
Two screws are used to fix each unit in place. Fixing is through the front of the unit and into the sash. For use primarily on Timber and Aluminium windows. Can also be fitted to Vinyl and Fibreglass units where suitable fixing is available.