JKing Set of 12 New Plastic Stretch Wrist Key Coil Wrist Band Key Ring Key Chains Key Holders for Outdoor Sport (Yellow) Color:Yellow; Portable and durable,can be hold your keys easily Material: Plastic Flexible plastic coil expands to secure keys around wrist,and,fits comfortably perfectly around your wrist Coil size:about 50mm; With 1"(25mm) diameter nickel plated steel split ring They are suitable for securing keys ,perfect for company,home,outdoor sport ,or during water sports etc