Recently bought a house where locks to the external rear french doors have been removed by the previous owner. Went and bought what I thought were the right sized sashlocks but seems I got it wrong. The recess in the door has been created on two levels and so leaving a gap when I fit the lock. What have I done wrong? Appreciate this is basic stuff and I know one answer is to call in a locksmith but any tips appreciated. Cheers, Brian.
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