ACCO Products - ACCO - Metal Book Rings, 3/4amp;quot; Diameter, 100 Rings/Box - Sold As 1 Box - 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 - 3/4&quot; Ring_Materials - Nickel-Plated Steel Quantity - 100 per box Pre-consumer_Recycled_Content_Percent - 0%