How to identify stainless steel?
Stainless Steel is mainly made of Iron, Chromium, Molybdenium and Nickel. There is two well known metals that are ferromagnetic : iron AND nickel.
So, stainless steel might be slightly magnetic.
We can not directly judge by using the magnet whether the product material is stainless steel. Instead, it should be professionally tested in a special stainless steel test liquid.
Description of the test solution results:
It will turn light yellow if it made of stainless steel.
✔️ Put the test drops on our turnbuckle, and it turns light yellow. So, Our turnbuckle is indeed made of stainless steel.