I have a set of the "Apex" type hex bits and handled screwdriver from Chapman Manuf. in N. Caro. They are brittle and I don't care for the large dia. reciever end of the handle because it doesn't get into close quarters and tends to get in contact with things it shouldn't. I find myself resorting to a cheap Stanley insert screwdriver handle with a thinner shell at the business end and sets of those Tru-Valu bargain table insert bits in the little rubber holder (usually several common bits in there along with Torx and Star and Phillips 1, 2, and 3s which I can readily loose, wear out, or break at work in a cordless). They grind just as well and don't fracture readily. I'm not touching 30K shotguns with them and I wouldn't recommend that anyone save a few dollars and do so but they work for me.
jack
