Tarnish Resistant 304 Stainless Steel Magnetic Clasps with Glue-in Ends, Column, Stainless Steel ColorSize: about 10mm wide, 18.5mm long, hole: 6mm.These clasps have two parts which are made up of stainless steel and positive and negative poles of the magnets respectively inside and thus are able to absorb each other. Magnetic Clasps with Glue-in Ends offer many design possibilities at meanwhile. Used for the necklace, bracelet and other jewelry project.