Like Chris and Lance, I use the drill bits "hands free" as well, I find that I have a much better feel of the drill bit when I spin it between my fingers, it takes little flexing to break these bits so extra care is needed when using them. Any size above 0.5mm I use in a pin vice, these larger bits are quite a bit stronger and are not prone to break as easily, but, as said before, they are excellent drill bits, very sharp and very accurate in size.
Des.