Comes with 5 keys to prevent loss. The keys are thickened to resist twisting and breaking, and the lock operates smoothly. Easy to install. The Multi Insurance Lock has a simple, clean design that fits with modern home decor. Quick installation helps keep your space secure. Material and build. Made from stainless steel and copper, heat treated and hardened to resist forced entry, with high impact and fracture resistance. Applications. Suitable for security doors, dormitory doors, and access doors; also used in school projects, construction projects, hotel projects, and similar settings. Use scenarios - Install on residential gates or entry doors to deter unauthorized access. - Secure dormitory or shared facility doors in schools. - Provide reliable locking hardware for construction sites or hotel projects during build-out or operation.