The Gerber Tool Kit is exceptionally well made. Really, it is. The driver bits themselves are precision cut and cleanly formed (not sloppily cast to size as are many hex bits one finds these days) And they are shiny nickel plated so they won't rust. The bit adapter itself is obvioiusly custom made for Gerber. It is slightly longer than an ordinary hex socket. There is a 1/4" hex in one end and a square in the other, which fits snugly on the phillips screwdriver. A powerful magnet is pressed into place halfway through (see picture below). It makes the socket "stick" to the phillips as well as making the screwdriver bit stick in the socket.The whole kit is contained in a rubber holder.If you are thinking of a bit driver kit I would definitely recommend the Gerber one.(Image removed from quote.)(Image removed from quote.)