Free gilding action - No snagging; no effort; no hassle. These shower hooks feature specially engineered spherical balls to reduce friction and allow effortless gliding across the rod with virtually no effort at all. Double shower hooks - The double shower curtain hooks could hang both shower curtain and liner. The shower curtain rings are strong enough to hold a heavy curtain and liner. Stainless steel - The heavy duty brass and durable stainless steel construction allows years of use in the harsh bathroom elements. The stainless steel is non-magnetic metal material, meaning it will last indoors and outdoors without rusting. Plated and polished - The steel is plated without rusting material and polished with matte black finish. The stainless steel shower curtain hooks look classical, adding a very elegant look to any bathroom. Set of 12 - Sold as a set of 12 shower curtain rings. Fit all standard size shower curtain rods.