The high-end necklace from Ethic.

1 screw is not enough? Buy 2! And it will cost you 16€ cheaper than the double sylphe.

In "simple" mode because only one screw, it can put off some, but one screw is enough for tightening, useful for those who want to save the slightest gram.

Be careful not to tighten it too tightly. Available in 31.8 or 34.9mm version.