Tension inlay (tension ring) refers to the inlay method of supporting the two ends of a diamond from the left and right sides by using the pressure generated by the tension of the metal itself without ring claws and ring platforms. Because this inlay method can fix the gem in the state that the two ends of the ring are clamped, the diamond looks like it is suspended in the air, which is its characteristic. The advantage of the tension ring is that it can attract a lot of light to the diamond from all directions, so that the beauty and light of the diamond itself can be fully displayed. Moreover, if you use mirror inlay, you can reflect the light of the diamond and make the light of the diamond look brighter.

The ring with tension setting was published by German jewelry brand "Niessing" around 1979. Because it is famous for its company name, it is also called "Niessing Ring". Niessing ring has a sense of design that tries to integrate technology and art, which is inherited from the spirit of Bauhaus Institute of Arts and Crafts in Germany. 200 1 was recognized as a work of art and then exhibited in art galleries around the world. Now it is protected by art copyright, so as to avoid forgery.