A:ASRock ATX motherboards are ATX specification 1.1 and 2.0 compliant, so the screw hole, which is on the right bottom of board, will be double holes design. According to the ATX specification, it is not necessary to screw this hole, you can please just use a plastic stand to bear this hole. If you still want to screw this hole, please do not over-tighten the screw, doing so may damage the board.