1.[ Stainless Steel]The Chain Door Guard is constructed of stainless steel.About the door chain lock heavy duty: 5 inch length body; 6.7 inch chain length; Material thick:1/16 inch thick.H&Q steel material features high hardness, corrosion and rust resistance, strong & durable, better to prevent break-in.The stainlee steel is used compatible with our chain lock,door chain lock,door chain and chain locks compatible with inside door.2.[Anti-Theft Design -Child & Pet Safe] With Spring Anti-Theft Press Lock, Increase percompatible withmance, Reliable Protection Against Intruders.Protect your family with an extra locking device compatible with front and interior doors.The security locks compatible with doors inside and chain lock compatible with front door, can also be used to -proof your space or compatible with small pets to get in and out of the house ly.3.[Hand Brushed Finished]The h-q stainless steel hand brushed finish,pure and beautiful appearance, to ensure the chain door lock not easy rust and long life.Choose to fit your doors with additional locks in brushed nickel,matte black, red bronze,gold and bronze,which is a perfect match to contemporary home decoration.4.[Secured Viewing Or Ventilation]The heavy duty chain latch is a security locking device compatible with doors, which ensures viewing and ventilation while door is partially open, providing added security compatible with your home and office doors. It can not be unlocked from the outside to guarantee your .