1, interlocking structure, simple structure.

2, because it is O-shaped, it is not easy to hook hair and clothes, which is more convenient.

The disadvantages of O-chain are:

1, because the O-link interface is clicked, it is easy to break.

2.o-chain is more susceptible to external oxidation; Therefore, when choosing accessories, we should make corresponding choices according to our own needs, and also consider materials and other issues.

Related information:

Since ancient times, in order to beautify the human body and the environment, people have made necklaces with different styles, characteristics and styles to meet the aesthetic needs of people with different skin colors, nationalities and aesthetics. This paper introduces the style of necklace from two aspects: material and style. As far as materials are concerned, there are several kinds of necklaces in the jewelry market, such as gold, silver and jewelry.

Among them, the fineness of the gold necklace is red gold, 18K and 14K. The fineness of silver includes 92.5% silver, silver plating and gold plating. Jewelry used as necklaces includes high-grade materials such as diamonds, rubies, sapphires, emeralds, emeralds and natural pearls, as well as middle and low-grade materials such as agate, coral jade, ivory and cultured pearls. Jewelry necklaces have stronger decorative effect and richer color changes than gold and silver necklaces, which are especially popular among young people.