Can Be Use For Earrings Or Pendant. Half Drill Needs Glue In Bail. Produced by Swarovski Starting In The 1950s Or 1960s. These Are No Longer Being Produced Today. The Bails Are An Plated Alloy Metal. Included In Purchase Is Two Bails Made Of Plated Alloy Metal As Pictured In The Photo. You Need To Glue Them In The Correct Way for Which To Want to Hang The Bead. Glue Using Hypo Cement Or Beadalon Beading Glue.