Base material: Steel.BHMA certified lifetime warranty.Heavy duty exit device in surface and rim design.Two lock points for double door.Full length push rail.Vertical rod type panic exit devices are non-handed easily reversible.Rail assembly and end are steel.Conforms and meets ADA regulation.Lever and escutcheon trims are grade 1 construction with clutch on rose trim.For door leaf thickness up to 2".Max door weight: 440 LB.Ideal for emergency exits with two swing doors.