15 pieces nickel plated steel loose leaf binder rings
Features:
Unique Design: The misalignment occurred after opening, because the binder ring itself did not use spring or other elastic devices, in order to make the bite tightness after closing more tightly, so this design was used
Specifications:
Material: metal 
Sizes: 2 inch / 50 mm diameter
Package: 15 pieces
Notice:
Be away from water and acid environment
Please check the dimension of your items before you purchase
You may use more strength to open or close it
Small parts, not for Children under 3 years old
There may be some error in the material object