Designed for storage areas and hotels, this universal door lock is built to work on both interior and exterior applications with seamless integration and no need to modify door frames. Key benefits - Dual secure access: supports up to 1000 combination codes in addition to a physical key lock, using a 3-digit design to provide dual security and resist tampering attempts for more than 15 minutes. - Easy, tool-free installation: includes adhesive backing for quick mounting; no drilling required and no extra tools or materials needed; typically installs in about three minutes. - User friendly operation: features a smooth mechanism and tactile depressions for easy handling, suitable for older users or those with reduced dexterity while delivering reliable performance for daily use. - Practical compatibility: designed to integrate with storage rooms and cabinets in hotels, offices, and similar environments without compromising door frames or configuration. Specifications and performance - Access options: 1000 combination codes plus a physical lock; 3-digit combination design. - Security: dual locking technology aimed at resisting attempts for more than 15 minutes. - Installation: adhesive mounting with no drilling; quick three-minute setup. - Usability: smooth mechanism with tactile depressions for easy operation. Use scenarios - Hotel housekeeping and staff storage rooms: secure supply closets and inventory lockers without altering existing doors. - Shared office and warehouse cabinets: protect communal supplies and tools with convenient, user-friendly access. - Dormitory and school storage: safeguard personal and shared belongings in student housing or classrooms. This description preserves the original design intent and functional features while presenting a clear, concise, and conversion-friendly overview.