The Door Anchor Portable Lock is a unique personal safety device for your home, hotel room, college dormitory, "crash pads", anywhere! The patented design features a steel, hinged door lock which inserts into the door's strikeplate. The "anchor" then hooks around the doorknob once the door is closed, anchoring the door to it's frame. 

This portable door lock stops silent unwanted entry even by someone with a key. It cannot be "picked" so will stay in place even when the door knob is turned, or if the lock is picked or broken. No tools needed to install or remove.