For smaller artwork (up to 20” x 20” I love the Hillman Hooks - found on Amazon Here

Screen Shot 2021-10-12 at 7.04.30 PM.png

And Larger Work 20 x 30 + I recommend drywall anchors and a flathead screws, found here

Screen Shot 2021-10-12 at 7.15.29 PM.png