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DHunter -- You can rely on any of the brand-name Torx wrenches, but Bondhus seems to be the most readily available in retail stores here in the San Francisco area. Frankly, I've also had good luck with a set of Taiwan-made Popular Mechanics brand "star bit" socket drivers I got from Wal-Mart several years ago. Wal-Mart has, of course, recently discontinued the Popular Mechanics brand name but what look to be the very same tools are now being sold under the Stanley banner. There are two factors that grossly shorten the life of Torx-type drivers. The first of these is using an undersized bit, which is very easy to do. A properly-sized bit will not fit into the screw with any looseness; often the next-size-too-small bit seems to fit ok but I'll strip the screw, the driver, or both of any significant torque is applied. The second factor is failing to seat the driver fully into the fastener opening. Dirt, grease, or rust in the fastener opening will certainly keep the driver from seating properly, and will lead to stripping. Deliberately not seating the bit so as to be able to drive the screw slightly off-axis will also kill the bit in a big hurry. Almost every failure of a Torx-type bit or recess I've seen has been due to one or both of these factors. Using the very largest bit that fits into a clean fastener opening and seating the bit fully into the opening will result in substantially greater fastener and bit life. John
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