I believe you are thinking of set screws.
Yes thank you. I was trying to think of the correct name but was coming up blank. lol. I prefer those over ones that require ring terminals on the wire as you can make them neater and fit a lot more on the buss bar than to cram a ton of ring terminals together in one location.
if you find somewhere for some bussbars pm me ive been looking but there's a good wait time at a lot of places