These door locks are suitable for all door types including wooden, metal patio door lock, French door and composite doors. Key for additional security and helps to prevent them from being copied by unauthorised people who might have occassional access to your keys. Features anti-pick, anti-drill, and anti-bump protection to give you peace of mind and proper home security. Features unique anti-bump protection that does not use trap pins. This ensures the turning of the cylinder key is extra smooth, while blocking access from bump keys. Enhanced Security & Convenience: Thumb turn euro cylinder lock with key access outside and smooth thumbturn inside for quick, keyless locking on any front door lock or internal door lock., Manufacturer: POASDJDC