Product Review

Integrated flange nut, and wide flange on one side, and the spinning washer.
The dispersion of the nut, the pressure reduces the risk of damage, which would reduce the possibility of loosely fixed makes a flat surface.
This provides the flanges serrated locking operation. This is because the saw-tooth angle, the direction of rotation of the nut, and the nut is loosened.
The serrated washer, and can be used on the surface of the wound.
To prevent this sawtooth oscillation of the nut, increasing the holding force of the nut.