AM (4-7/8" x 1-1/4") For use with Mortise locksets with a normally extended 1" deadbolt and a deadlatch positioned below the latchbolt. Compatible Locksets: Accurate, Best (45H_&_47H, and 34H-37H), Corbin/Russwin, Falcon, Sargent (7800, 8200, & 9200 series), Yale (8800).