Rigel Technology Corporation

This patent discloses a special screw to provide a practical way for protecting vehicle license plates or others from being stolen.

The screws have the function to be pressed and expanded and the non-screw part. The screws are screwed through the holes on a plate and into the holders or holes on a vehicle body to hold the plate. The screws can not be taken out by a screw driver or pulling force from the outside and can be taken out only from the inside, which protect the plate.