Petsafe Big Cat Flap Guide D'installation page 7

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Remove the cutting template and any excess tape from
If you removed your door from its hinges, rehang it now.
the door.
Using a jigsaw, cut between the holes you just drilled, along
the marked cutting line. Make sure your jigsaw blade is
appropriate for the door material you are cutting through
(wood, PVC, metal, etc.) and at least 25 mm (1 inch) longer
than the thickness of the door.
Use both hands to hold the jigsaw firmly against the door.
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