Grommet for Fabric

I needed to hang a heat lamp from the top of my spray painting tent. This four-piece grommet securely grips the fabric between two discs (washers), and the insert clamps the electrical cord from the lamp in the center of the hole. I can imagine using it without the insert, or with other types of inserts, to pass hoses and cords through anything made of nylon, polyester, or canvas. If there is interest, I can draw a version for solid materials that omits the dimples used to grip the fabric.