I saw a video where the reefer keeps his collections of torches on what appears to be frag plug mounted on screw/bolts and I see what looks like nuts attached to the rocks, I think the idea was to be able to secure the torches firmly to the rocks, but easily removable to move the torch if it is not happy at the location. I don't think they are bolts/nuts from hardware store, Does anyone else use this kind of frag plugs ? Would be interested in trying those type of frag plugs if anyone sells those. Here is the video I was referring to.