After he did it the first time, I linked him a nice Wiha set. He stripped more a week later because he hadn't gotten around to buying the screwdrivers. (iFixit is great too)
Torx is a trademark for a type of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 by Camcar Textron. A popular generic name for the drive is star, as in star screwdriver or star bits. The official generic name, standardized by the International Organization for Standardization as ISO 10664, is hexalobular internal. This is sometimes abbreviated in databases and catalogs as 6lobe (starting with the numeral 6, not the capital letter G). Torx Plus, Torx Paralobe and Torx ttap are improved head profiles.
Torx bolts in the T40+ size that are exposed to moisture are impossible to remove. I've just moved to welding a nut on before I even go through the trial of breaking off half a dozen bits and then doing the same.