P,
All I can reiterate is what MB has given on one of his links.
I used to get my taps and dies from wherever I could, but have now settled on the Tap & Die Co.
They are HQS, and I have never come across taps and dies that cut stainless so easily, they cut it just like a normal one cuts brass.
They do seem a little expensive intially, but I go for the price breaks. The only problem is, I never seem to break one, so the ones I have purchased should last me until the end of time.
In the UK, because they deal mainly with industry who work on turnaround times, I can order late in the afternoon, and the tools are with me first thing the next morning.
I have no affiliation to the company, only being a very happy bunny with their quality, service and price breaks.
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