Rather than HF, if I was looking for 'cheap' 6" insert bits I would go to Quickscrews
https://quickscrews.com/catalog/drive-bits?TID=498&length[]=s-6.000
However a few years ago Klein made a screwdriver handle with 6" black coated insert bits. They have since discontinued the handle and kit but you can still find a few of the bits available. For the several 6" (a size I use commonly at one job) I have tried, these are the best. And when I say best, there may be better insert bits but not a lot of brands make 6" ones, and typically the ones you find are the more box store quality than fine top tier tools.
https://www.homedepot.com/p/Klein-Tools-6-in-Power-Driver-Set-2-Pack-32235/205504226
https://www.homedepot.com/p/Klein-T...wer-Bit-Drill-Bit-Set-4-Piece-32795/309983189
their current set is 3-1/2" and it's not the same, but are also nice
https://www.amazon.com/dp/B00PP4LGO0/?tag=atomicindus08-20
and if you happen to need a 12" as I also sometimes do,
https://www.amazon.com/gp/product/B072J5RPG1/?tag=atomicindus08-20
I don't use these daily but typically I do weekly. Most often with an M12 drill until I got my new surge drive which is the greatest. Sometimes with a T handle. I've owned most of them for 3+ years and they pretty much all look and work just like new. If I did service calls most or all the time I would surely have some cheapos for some jobs, but if you keep up with your stuff it's relatively easy to either not lose stuff or manage things if something breaks or is unrecoverable. Case in point I know the last job I did there's still a glow rod in the drop ceiling. It's threads are basically stripped and it wasn't worth the effort to go back up and find which spot it fell out of the other one. Hopefully I lose the other two of that **** southwire set and get them to buy a Klein set to replace it.