(Our letter box will fit most uPVC, Composite & Timber doors. ANTI-SNAP FLAP – The flap opens a full 180 degree for easy access and to prevent it from snapping off when opened too far. 6) Use either the 2 short OR 2 long bolts (depending on your door thickness) and screw into centre hole at either end of the letterplate, ensuring that you DO NOT TO OVER TIGHTEN fixings.
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