- The QDB100 comes standard to fit doors 1-5/8” – 2” thick.
- The QDB200 comes standard to fit doors 1-3/8” – 1-3/4” thick.
- QDB200 SFIC require thin door spacers (8Q00082) for 1-3/8” doors.
- QDB100 and QDB200 double cylinder SFIC also require thin door spacers (8Q00082).
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