Stainless steel doesn't rust and is strong and clean.
Stainless steel is the best balance of material properties and price... ie you get the most bang for your buck!
The shine level of our rings can vary - it can be compared to a stainless kitchen sink. If you need to shine up the rings you will need to research steel shot tumbling techniques.
Polished closed rings can be opened and used like regular butted jump rings.
SX-SS-PL-16516 has an ID of 0.434". This is 0.0015" less than normal and is may make a difference in some weaves.