Features

1. Units  are  just  stacked  up,  assembled  and  device  is  completed.
2. Able  to  change  the  system  easily.
3. No  galling  due  to  levitation  sliding  of  switching  core.
4. Able  to  minimize  abrasion  by  sliding.
5. Able  to  counter  measure  contamination  from  abrasion  powder.