size question

[Jack Klarich]

I agree that cheaper brand Torx wrenches may fit sloppy, but the OP doesn't indicate a brand name. If you're going to do your own maintenance you have to invest in some quality basic tools.
That being said, one trick I use if the Torx or hex fits a little sloppy is to put a dab of valve grinding compound paste on the end before inserting. It will tighten things up just the right amount.

TORX PLUS Low Profile Head Drive System - Increased Screw Drive Strength - Camcar Screws from Acument (Formerly Textron Fastening) Good info you have here, Torx plus gives you a better grip, Valve grinding compound HMMM I have not tried that tho it would work as good may be better than Anti Sieze I have used in the past for a better bite:s