SL57 SD/HD

Fits narrow (7/8"22.23 mm) frame face.  Tamper resistant, removable door leaf cover.  1/16"1.56mm door inset.  Standard barrel nuts accommodate 1-3/8"32.95 mm to 1-3/4"44.45 mm doors.  Long barrel nuts available for 2"50.8 mm to 2-1/4"57.15 mm doors.