There are two types, one is thick type (ATDS series), this is
a kind of structure nut, can replace the normal nuts directly. It
could be used in the new tower. And another type is thin
type(ATDN series), it is add on nuts, can used in the existing
tower, but depend on the length of remaining Bolts after equip
the normal nuts.
It is a patent design, adopt the steel balls and spring to
install in a certain location. When screw the nuts in the
clockwise direction, it is not able to unscrew due to the steel
balls and spring work.
No need to use special tools and fast installation.
