If your drilling stainless steel it would pay you to go with cobalt bits. Not essential but they keep there edge that little bit longer. Stainless isn’t a particularly hard metal to drill if you understand it. Most drills will go blunt no matter how good they are if you allow stainless to work harden. *That's ok then are they any good for 304 stainless
No 002 is tin coated hssDormer 002 is what they replaced them with