I legit have no idea what these are for. I am not the original owner and I’ve done lots of research to no avail. Thinking they could potentially be used as a door or window stopper but they note “silencer” on the labels. Per the label they are from the 3M Safety and Security Division so there is reason to believe these would be suitable for home or office or workplace but also could be more for working craftsman hardware type product perhaps - or really for whatever your heart desires. Hope someone knows what these are and they can find a good and useful home! Also since these are used and perhaps old buyer should expect a condition of that from use and storage.