Great for manual switch-bit screwdrivers, not drill types with a chuck.

I have an electric screwdriver (the kind like a drill) and I thought from the description these bits would work for drill type things and fit in the chuck...they don't, they are quite short- about 1/3 length of a regular drill screwdriver bit.  The description does say the length, but it also says they will fit in "electric drilling machines."  I took that to mean "standard drill" but I was mistaken, or perhaps they might work in something with a specific kind of chuck that I don't have.   Fortunately, I happen to have the kind of screwdriver (regular manual shape with a socket style end) that these fit.  So it worked out for me in the end.  They are of good quality and come in a nice little holder with a bag.  Just be sure it is what you are looking for!