Chrome 10mm male hook. Used to hang chain and can be fitted to a ceiling plate with a nut. This hook is not ideal for the top of a lampholer as the thread is to long. For that you need a hook with a female thread and a short piece of Allthread rod.
Please note - This hook will only fit the 3/4" & 1" chain directly. You will need to open the links up on the 1/2" chain.