Okay, there are apparently about 29 different slotted Imperial fastener sizes (or more) — I’d like to categorize the sizes used in watches/jewelry as well:
but typically only 9 different screwdriver sizes are in a set: https://www.etoolpros.com/automotive-tools/KDT-80015.html
While I can’t recall ever having needed a larger screwdriver size than the 1/2" Stanley I have of my father, there have been lots of times when I’ve been dis-satisfied w/ screwdriver fit for more reasonable size screws — time was I’d just grind a screwdriver to fit, and I’d like to just have one long session of that and be done w/ it, but would like to source commercial bits for as many sizes as make sense.
I’m currently working on enumerating the Brownells Magna-Tips sizes: https://wiki.shapeoko.com/index.php/Tools:Screwdriver#Brownells-_Magna-Tip.C2.AE_Bits
and I guess I’ll do Wheeler Engineering next, and https://chapmanmfg.com/collections/individual-parts/products/slotted-insert-bits and I do have a Grace USA Gunsmith 24 Bit Magnetic Tip Screwdriver Set on order.
Anyone got any resources / links / sources I’ve missed? In particular, a standard listing of metric sizes? (having a hard time wrapping my mind around https://www.pts-uk.com/products/machine-screws/slot-countersunk-machine-screws/metric-a2/a96302504 )