This product is an adhesive “cork knocker” for tobacco pipes.
It is used to tap you pipe on when done smoking to remove the remaining ash and dottle. Using this will protect the rim of the pipe and prevent unnecessary damage. Always hold the pipe by the stummel (the wooden part), when knocking, never hold by the stem, as that can cause a crack or break when knocking out on any surface.
Typically one would stick it to the center of an ash tray.
To stick it, clean the surface you’ll be adhering it to with soap and water, followed by rubbing alcohol. When the surface is dry, remove the peel off sticker on the bottom of the corks knocker and stick.
For a stronger stick use a couple drops of a C.A. glue, such as super glue or krazy glue.