I mostly go with Wheeler, as they are considerably less expensive. I remember measuring my K frames when I had them and ended up buying two Brownells bits, because they fit the side plate screws better than any Wheeler bits.
Brownells:
445-0
210-3
I have recently been using these on my M&P 340 and they fit the sideplate screws very nicely.
Without going and checking it, I'm pretty sure the Wheeler bit marked 110-795 is what I used for the thumb piece nut.
The fourth bit I keep in a ziplock marked "S&W" is a Wheeler bit marked 183-148. It has been stoned slightly to thin the tip of the blade, or perhaps more to just deburr it, as that is common. I don't remember what it's for, though. Didn't need it on the J. Might have just been a grip screw or something.
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I make a habit when I get a new gun of measuring the slot width and length on any slotted screws and making sure I have all the necessary screwdrivers. If not, I buy them. I mined the dimensions of all the Wheeler bits off the Midway USA site, as I couldn't find them published otherwise, and having a list makes it a lot easier to buy what I need than having to blindly bring up all the different SKUs until I find one with dimensions that are close. I like the Wheeler 3-packs Midway sells, as I can keep the original size while modifying the thickness or length of two of them as needed. However, as noted, other sources may be a better choice.
Wheeler_Bit_Chart with dimensions.pdf