re: Screwdriver size for tightening sunglasses?

Maybe yours is a Phillips?

JK, take a nail and sand it down until it is the right size to fi the slot. If you are feeling really creative, split a large piece of dowel rod and use your dremel to hollow out a groove to make a handle.

Apply glue, then put it in your vise until the glue dries. Sand it town to smooth it all out. Apply a nice stain that compliments your garage décor.

Now take that sumbitch, turn it sideways, and shove it up your roodypoo, candy arse.