I came up with a way to lock a door by modifying a dinner fork. Some folks may have seen my earlier video on my channel called 'portable door lock', which I made from flat 1/8' steel . The Fork Lock, however, is way easier to make. This lock is very useful when wanting to add a little extra security to a motel room, public restrooms (which often have broken locks), or on any interior, or exterior door.q.