3-PACK Vintage Bronze Heavy Duty Large Binding Ring Hinged/ Book Binder Ring /Loose Leaf Rings/Key Ring , 3.4 Inch Diameter 3PCS Large Heavy Duty Binding Ring Vintage Gold Colour Tone, size: 85mm Easy to operate--pull to open and squeeze to close. Locking position for extra security Ideal for hanging large fabric/leather/material samples, paper/ keys and swatches too!