Yale Assure Lock SL YRD256 Installation And Programming Instructions page 22

For 1-3/4"
(44.5mm)
Thick Door
1"
{25mm)
Dia.
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New Door Marking Template
2-3/4" (70mm) Backset
1 8
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~ 2-1/8"
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{54mm)
Dia
Thru Hole
,-- \-1
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2-1/8" '
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1"
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Thru Hole _
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For 1-3/8"
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(35mm) 2-3/8" (60mm) Backset
Thick Door
CAUTION:
If printed from electronic file,
set print scale to 1 : 1
Measure ruler to check scale.