Unhindered Action - no obstacles, no effort, no hassle. These shower hooks feature a specially designed spherical ball that reduces friction and glides easily on the rod. Metal Shower Curtain Hook - 100% pure metal construction will last for years in harsh bathroom elements. The non-magnetic metal is non-corrosive, which means it can last indoors and outdoors without rusting. Heavy Duty Enclosed Shower Rings - Shower curtain rings are strong enough to hold heavy curtains. They are sealed closed, making it impossible for the curtains to slip off the rings. Anti-rust Metal Shower Ring - unique metal sealing oil technology, making it possible not to rust. Packaging - 20 Pieces Fits all standard size shower curtain rods.