Portable, easy-to-use spin dial combination lock locking box; padlock stores up to 3 keys on doorknob Key lock box allows for easy key-access in real estate, construction, and general security applications The key lock safe has a spin dial combination for quick entrance into the box and to retrieving your keys Set your own combination with 10,000 combinations available; keep doors locked for optimal security and allow keyless entry for those you want in The door knob key locker ships in Certified Frustration-Free Packaging; easier to open in a plain brown box