The component to rest the read-write head when hard disk drive  stops working. It also provides smooth move-ment of read-write head once the hard disk drive start working again.

The basic component to cover   hard  disk  drive and protect inside com-ponents  from   external interference    such   as dusts,  moisture,  etc.

The crash protection component for read-write head. It works while the head is moving toward the confinement.

The locking component of read-write head set.  It works after the head parks with Ramp when hard disk drive is going to stop working.