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We use our fingernails to open the old key rings which would do harm to our fingernails. And it is not easy to use. This new key ring with a 40 degree angle is very convenient for us to open the key ring easily. Most keys can through the key ring directly.
Inside diameter: 30mm
Outer diameter: 38mm
Single layer thickness: 0.8mm
The opening size: 2.8mm
Xiamen, Fujian Province, China