The Sargent 70-8225-LNL-26D is a Grade 1 Heavy Duty Dormitory or Exit Function Mortise Lock with an LN Rose, an L Lever, and SFIC Less Core, is Field Reversible and comes in a Satin Chrome Finish.
Sargent 8225 LNL 26D has a 2-3/4" backset and is for use on 1-3/4" thick doors.