These are the best Allen drivers I have ever found. I still remember the first time I saw some at the Rule company in Tulsa 25 years ago.
https://www.amazon.com/Bondhus-10632-Balldriver-Screwdrivers-ProGuard/dp/B0006O4ABK/ref=sr_1_2
https://www.amazon.com/Bondhus-10632-Balldriver-Screwdrivers-ProGuard/dp/B0006O4ABK/ref=sr_1_2