General description The 2 Pack Steel Window Protection Latch is designed to enhance security for doors, particularly those without windows. These door security chain locks allow you to identify callers while preventing forced entry before the door is fully opened. With a heavy-duty steel construction, they are exceptionally strong and effective against violent break-ins. Technical specifications Material: Heavy-duty steel Color: Black Opening allowance: 30-50mm Installation No drilling or chiseling required for installation Usage Provides reliable protection for doors, storage rooms, windows, etc. Ideal for use in hotels and other establishments