* The mounting head is made of special steel, which is wear-resistance, unbend
   and unbreakable.
* The structure of the swing arm featured with economical and practical.  
* The customer can optional equip the plastic tool head according to the
   requirement.
* The universal switch is 40A with a pure silver touching point, it can bear great
   load with a long using life.
* The protective sheath of the bead breaker is optional.