I generally like U.S. made tools, and in the past I’ve gone as far as to recommend Snap On bits, but just of late I seem to have twisted a couple, so I think I’m coming round to the same view as Skin above - nothing great and very expensive.
I do tend to use KoKen (Made in Japan). I find them to be very durable, and I generally use the two piece bits so if there is any damage I can replace the insert.
I also use Hazet. Like most makers, there are areas they are strong and weak, but these bit sockets are one of their strengths. Their 1/4 drive bits are one piece TiN coated and seem to be very tough. They also offer stainless.
I wouldn’t get too hung up about warranty. If you look at the wording, what you are actually covered against is “defects in manufacturing”. Just because you twist a tool, it doesn’t mean it’s defective. It so happens that Snap On will generally replace twisted bits, but boy, do you pay for that. I can buy 3 Hazet bits or 4 KoKen for the price of one Snap On.
When I buy KoKen bits I generally buy spare inserts at the same time. Given the prices they charge, I’m happy to do that, and in the event of damage I can sort it instantly. I may have been lucky, or careful, but I have yet to twist a Hazet!
One other option you have, is just to buy a 1/4 drive bit holder, and just use hex bits. I know there are some downsides (risk of dropping bits) but you can then use any 1/4 inch hex bit, and bin it if you damage it!
