This brass hardware is designed to prop open the lid of your piano bench--keeping it open while you access the music compartment. It is designed with a notch so that the lid can be supported while getting music out without putting pressure on the hinges of the bench. The smaller flat piece with the two screw holes attaches to the lid of the piano bench, with the longer piece going on the inside of the music compartment. The screw inside the music compartment fits into the notch when the lid is open, propping open the lid.