My Chevy truck has lots of 7mm screws on the interior dash and door
panels. My distributor cap has 5mm screws. Fortunately I have a set of
metric tips that are intended to fit into a 1/4" driver handle. But they
dont stay in that handle, and when working under a dashboard or on the
distributor cap, you cant risk the tip falling out of the handle.
Therefore I have to always duct tape the tool together before use.

I finally decided to buy 5mm and 7mm nut drivers. Guess what, I cant
find them anywhere in the stores, at least not locally. Not even at the
auto parts stores. The Nut Driver SETS start at 8mm and go up from
there....

This is a rural area, so I dont have access to a lot of stores, but
you'd think these would be easier to find, at least at the auto parts
stores. I have even looked at the low end, foreign made "junk" tools at
some stores and none seem to sell these sizes.

With plenty of these screw sizes in use, why is it so hard to find the
tools?