Review on General Tools S838: Efficient and Durable 16 Inch 2 Inch Solution for All Your Needs by Bernard Her

Didn't read the reviews before buying because how could it not work? As other reviews have noted, the Allen key is incorrect. The size of the set screws, the combination of poor tolerances and lack of width means they won't tighten perpendicular to the bit if you place a stop somewhere in the grooves. Other reviews say they are easy to remove, I haven't done this yet but I really think it would be easy enough to do. I haven't really used it yet and to be honest I probably won't because I don't have confidence that I'll tighten it enough that it won't move without taking it off. Save money and buy something better