I think my home workshop is in the middle. I have more wall plate screws than anyone else, of varying lengths, that I use for everything. I think that's a common thing. So I was surprised that these end caps didn't close with wall board screws, which of course I intended to use to attach the handmade rug to the wall. I found other screws in my junk drawer that worked but had less than ideal threads for the job I was doing. Just wanted to warn the neighbors who own the house. The head of the wall plate screw sticks out too far for the lid to snap into place.