Package includes 1 x Door Security Lock Key features Size: 7.70 x 6.00 x 3.50 cm (3.03 x 2.36 x 1.38 in) Color: As shown Material: Metal Durable metal construction for reliable door reinforcement and long service life Compact design with a simple, unobtrusive exterior that matches many door styles Easy DIY installation, no professional skills required Fits a wide range of doors including wooden, metal, and PVC doors Designed to add an extra layer of security by preventing the door from being opened from the outside when engaged Why you need it This metal door security lock strengthens a standard door latch without major modification. Its solid construction resists daily wear and provides an additional barrier against unwanted entry. The compact size and neutral appearance make it suitable for homes and workplaces where discreet reinforcement is preferred. How it solves common problems Reinforces weak or old door latches to reduce the chance of forced opening Provides quick, easy added protection for occupants without replacing the existing lock Simple installation and operation let users add security when needed and remove it when not Performance and compatibility Built from sturdy metal to withstand repeated use and resist damage Compatible with most interior and exterior doors including apartment doors, front doors, room doors, and office doors Small footprint works well on doors where space is limited Typical use scenarios Home front door: Install as an extra barrier when you are at home to restrict the door from being opened from the outside while still allowing quick removal when needed. Apartment or hotel room: Use this lock for temporary reinforcement when traveling or staying in shared buildings to improve peace of mind. Office or private room: Add controlled access to an office or private room without changing the primary lock. Installation and operation Simple mounting and operation allow DIY installation in minutes No specialized tools or professional fitting required Operates as a secondary latch that engages or disengages quickly for everyday convenience What is included One metal door security lock, ready for installation This door security lock is a practical, durable solution for adding reinforcement to a variety of door types without complex installation.