What does it mean when a lock pick has a "Metal" or "Stainless Steel" handle?

What does it mean when a lock pick has a "Metal" or "Stainless Steel" handle?
I am shopping for a good set of lock picks and I have run into some confusion. Some lock picks are advertised as having "metal" or "stainless steel" handles, while others do not have that advertised.
14 Piece Lock Pick Set-Metal Handles
14 Piece Lock Pick Set-Metal Handles

Here is a good example of a set that has the "metal" handles. Perhaps from the description you can understand what it means and explain it to me a little better, because I am confused!

http://www.lockpickshop.com/MPXS-14.html
i.e - What do lock picks WITHOUT "metal" or "stainless steel" handles typically have for handles? Specifically concerning to other picks on the website that I linked to..


Best answer:
Stainless steel is a type of metal that is more resistant to corrosion than normal steel. If you are using these in a salt air environment or any environment that has dissimilar metals in an electrolytic solution, you will get corrosion, but stainless steel will corrode less, and slower.


Know better? Leave your own answer in the comments!