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If you’ll entertain a potentially silly question, why not cobalt instead of HSS if used on stainless steel?
Muc-ed-off-
They’re good for mild and stainless steel. Good for wood too if used in a pillar drill, but I prefer brad point bits for timber.
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Cobalt drills are great if you use them on a machine at higher speeds with lots of lubricant. They’re not really suitable for hand tools, they’ll chip and snap easily.
Drills specifically for stainless are cut at a sharper angle. The reality is a good quality jobber drill will be quite happy doing occasional stainless work. You’d only have a separate set if you were in a workshop.
If you buy a set of black Dormer drills they’ll probably be the only drills you’ll ever buy and you’ll wonder why you ever wasted your time with anything ‘branded’ from Screwfix.
dbr
Jonny69
I’ve been very happy using DeWalt Extreme II bits in my metal workshop for years. You can’t enlarge holes with them, but that’s a quick way to ruin bits anyway. Best thing is never need to pilot hole.