8x5mm Antique Brass Round String On Clasp with a silicone 2mm hole. Fits two pieces of 1mm-1.25mm cord or chain. This clasp has a silicone grommet inside to securely hold the cording that you can thread through it. These are made from naturally hypoallergenic brass and electroplated nickel free using the highest quality materials. Our string on clasp is basically a stopper bead with a soft silicone grommet that wont damage any of your jewelry making materials. We absolutely love how professional this clasps make our jewelry designs look and feel. You'll love this universal slide on clasp! Sold individually.