consider the lowly "TORX" brand fastners; you really don't think much of them, until a customer comes in wanting a socket to remove one. in their design feature, much to most mechanic's dismay,their one most pressing feature is the one they do best; resist stripping out.
most tech's and counter people will agree that in the conditions they are used, they work extremely well, by avoiding the rounding off of the shoulders of the bolt. in theory, by placing the stress on the inside of the fastner, in a tool that places the torque in multiple points, makes for a better fastner all around. and since the bolt(nut) is generally hardened, it resists stripping out even further. what drives most back yard and entry level counter people out of their minds is the simple fact the tool that is designed to remove these bolts is made of a "soft", mangable metal, which is designed, to break or shear off if over stressed in usage. how many times have you been asked if you had any 1/2 drive torx sockets? if you need a 1/2 drive or an impact resistant type socket for these, "you" are going about this the wrong way. how many times a day do you get some one returning a "warranty" socket, with of course, the head sheared off, or twisted? when you try to explain to "johnny backyard" that the tool is only warranted for structual defects, not due to mis-use of the tool as for it's design intent? i have had on many occasions, so called mechanics, telling me that so and so retail store warranties the sockets all day long, i send them on their way, to those places; ask any Snap-on tool rep, sure, for 25.00 a socket, i'll warranty the damn thing, but at $2.79, the first time i try and warranty it, i am told to toss it and eat the cost; after two or three of those so-called freebies, now i am at a losing point; any tool salesman worth his or hers salt(or 10w30) will tell you the tool is designed to fail, shear or break off, so that you, the smuck taking off the bolt, doesn't do any further damage and strip out the fastner and make the task even harder. for god's sake, lube or heat the damn thing and you'll find, 90% of the bolts come easily out; sure, many safety hardware, like seat belts, the bolts are not designed to be removed and are bastards to remove( look under the car, cut of the fastning plate, the bolt comes out real easy) so a little patience or fore thought will aid in using the right tools for the job, including the tool that is in your head; you'll find those little "star" bolts aren't so bad and just another bolt in your life.