Material and durability - Made from stainless steel with a smooth finish for a rust-free, long-lasting use - Resistant to bending and breakage, offering strong load-bearing to withstand external influences - Provides reliable, safer protection for your door Enhanced security - Theft-protection security chain adds protection above the door lock and latch - Effectively deters burglars and unauthorized entry by increasing stopping power Easy installation - Includes the security chain and screws for mounting on the back of the door - Compatible with all types of wooden and metal doors - Can be installed over the door or beside it for flexible positioning Smooth operation - Operates smoothly without snagging - Easy to lock and unlock with a gentle, unobstructed motion - Does not apply pressure when unlocking Use scenarios - Residential doors: front or back doors in homes for added security - Apartments or rental properties: simple, temporary security upgrade without major renovations - Small offices or commercial spaces: secure entry doors while maintaining easy access for authorized personnel Specifications and compatibility - Material: stainless steel - Surface: smooth finish - Suitable for all wooden or metal doors - Installation: back of the door, with included screws - Function: provides extra protection over the door lock and latch, smooth operation, easy to use This description preserves the original product features and functions while presenting them in clear, customer-focused language with practical use cases.