I would advise going to a hardware store (the bigger the name, the better) and buying individual torx drivers that fit a few knives you bring. Opt for a brand of drivers that carry a lifetime warranty (Craftsman is pretty much tops there) that covers wear and tear. The heads of your drivers will eventually twist. I find myself replacing my drivers (mine are T6, T8, and T9- those 3 cover pretty much all production folders) roughly every 3-4 months.
All 3 of those drivers cost me roughly 12 bucks.
Buy a quality driver kit with hardened bits and it will last you a lifetime.
Like when working with Guns (or anything else),
...quality tools designed for the task at hand are the only way to go.
A note on those Torx bits:
Several sizes might seem to fit any given head size,
...but only one will fit it securely.
| Big Mike|
It's not the tool you use, ...it's how you use the tool!.
"A gentle hand to victory."