UPVC Screws. Gardinia Over Night Lock Composite Upvc Door Repair 30mm Backset 20mm Faceplate With Split Spindle. B - Backset: 30mm. This particular lock has a wider 20mm faceplate and is particularly useful for use on timber & composite door systems but will also work on steel or aluminimum door systems that used a 20mm wide faceplate.
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