Great set of tools to add to your collection. I have bought 2 sets of these over the last 10 years (and a set of standard that are still like new, today).
I use them in my power drills (they fit the standard size (1/4?) and chucks) and a small ratchet (1/4 'lug' like ratchet for a great power/speed application while giving you a good feel of tightness [got mine from Autozone, size of a golf pencil]), and these bits last for a very long time.
I have ground down the tips with a Dremel once, and now it is time to possibly buy more....after 10 years.
I've barely stripped many screws over 10 different kits over these years, and most were due to me not cleaning out the screw head before trying to remove it. I've gotten a feel for when a head loses it's sharpness....these tools are great for the price, and if you always keep a sharp hex around, you can always see how well these perform.
The blue handle it comes with is great, and I have 3 that have never failed now, but these bits are best used without the handle, lol.
Picked up a set of these for using in powered Screwdrivers. Highly recommended at LHS, and heard nothing but good things from everyone asked. Working for me great so far. Love em.
I use these drivers in a Ryobi powered screwdriver. The drivers fit the Ryobi perfectly, and work great. I have a couple of sets of Dynamite hex drivers, one of which is a few years old, and the tips have held up great. Highly recommended!
Been using the bits on my cordless Milwaukee hex driver. Invaluable for quick builds and rebuilds.