The XL11-820 & 10-145 is a one hole strike for latching functions, RH and LHR doors.
The XL11-821 & 10-144 is a one hole strike for latching functions, LH and RHR.
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Schlage Commercial » Mechanical Locks » Mortised » L9000 Series
When ligature resistant trim (SL1 or SK1) is ordered, then torx screws are substituted for the strike and for the armor front.
The L283-121 is the screw pack we substitute/ship in plac...
Schlage Commercial » Mechanical Locks » Mortised » L9000 Series