Kyocera SE47 / SE44 / V5 (Slider)

I took the magnet out,then the metal bar ,tried all the combos;by putting the magnet in you get the sound functions and the open and close functions as well.The bar by itself takes those functions away but allows you to use the phone while it is closed,which I prefer.Now my question is why is the bar there then,what function does it have?I left it in,to see if I notice a difference,I'll let you guys know what I find..Does the metal bar close a circuit or something,please someone more schooled on how this works please please respond,Im handy but not that bright. 😎