How It's Made Bolts

These bolts are small enough to fit in  the palm of your hand yet just one of  them can support up to  pounds  they're used for really big jobs like  holding together the steel girders.

 Inside buildings and bridges pretty  remarkable when you consider they're  made from nothing more than a single  piece of wire  this is the wire they use to make the  bulbs  it's just a little over of an inch  thick or about as big around as a  quarter it arrives at the factory and  coils.

 the screeching sound you hear is  the noise the wire makes as its pulled  through machines that I'm coil and  straighten it so it can be cut and  hammered into individual bolts the wire  looks white....