¹ There is no restriction on the number of locking points. Amount of locking points depends on the height and width of the openers.
² Friction Hinges - Side hung sashes < 530mm wide and top hung sashes < 530mm high cannot incorporate the additional locking points provided by the corner drive. At these dimensions the friction hinges take all available space.
Patented Chelton Secure™ Locking will give your windows the strength of steel and the best security available. This high security locking system, locks your windows round three sides. When combined with sash jammers it will provided all round window security. This locking system is perfect for use on slim-line aluminium windows and is highly resistant to corrosion as it uses a polyamide running strip combined with adjustable locking bolts.
...Six plus locking points pull in the window so tightly that not only do you gain superior security and increased protection against a break in, but the system actually improves air permeability - to provide increased sound proofing, cutting out draughts, and reducing heat loss...
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