Multi-layered nickel-plating won`t crack or split. Locking position for extra security. Easy to operate--pull to open and squeeze to close. Tough steel rings can handle heavy use. Ideal for keys and swatches too! Ring Size: 1.00 in; Ring Material(s): Nickel-Plated Steel; Pre-Consumer Recycled Content Percent: 0 %; Post-Consumer Recycled Content Percent: 0.00 %.