First would be my Optivisor w/No.3 lense (needed them after age 40+), next would be the No.5 lense for my Optivisor (needed a little stronger lense after age 50+) . Second wasn't a purchase, a good friend gave me a set of good Swiss needle files almost 30yrs ago. I use them on almost ever model, I have yet to find another set as good. Last would be my Dremel Stylus, very comfortable to use.