304 Stainless Steel Magnetic Clasps with Loops, Ion Plating (IP), Round, GoldenSize: about 12mm wide, 19.5mm long, hole: 2.5mm.Stainless Steel Magnetic Clasps with Loops, Ion Plating (IP) consists of two sides. When put them nearly, they can be absorbed together for their magnetic characteristic. It have two bails where threads or cords or chains can be passed through so that it can be used for necklace connection.