There work perfectly with wire grid panels! I bought them to organize my sewing room and they are great for that purpose.

I bought these shelves thinking I could mount them on pegboard. You would have to bend out the pin that goes into the hole a bit straighter or you cannot get all of the prongs in the holes. You can also drill out a slit above the hole in the pegboard to get the shelf attached. Not the shelfs fault. I thought I could use it on a pegboard and it didn't do well at that.