How can the stainless steel screws distinguish true from false?
Using hydrochloric acid drops to screw over ten minutes, look at is not a drop of hydrochloric acid black or rust, if the above two situations, which further proves that the stainless steel material is not 304 or better.
You can use a magnet to see whether the screws will be adsorbed, can be adsorbed, it is not true stainless steel screws;