^ I have one of those little Huot drill indexes as well - I've never had a need for them, but a person needs to be prepared.
Here's my contribution to the discussion: I had to replace the battery in my MacBook today, and the replacement battery came with these dinky little drivers. One is used to open the back cover, the other is used to disconnect the battery inside. One is six point, the other is five point.
The screws themselves were less than 1/8" long. Amazingly, I didn't drop or lose a single one.