works great with impact driver
359480
I used this bit to make a bunch of "dog" holes in a 1.5 inch thick maple workbench top.  These are high force / slow speed bits- a drill will not work, but an impact driver works great.  An old fashioned brace would also work, except that the shank is not designed for them.  I tried a socket-set ratchet with a 1/4 inch hex adapter- it works, but doesn't have enough pushing force once the self-feed screw breaks through.
2596101
Great impact drivers that last a long time to daily abuse and use. A really great price, so I got 2 sets for a little less than the home improvement store prices for 1 set!
4822049
Do what they say and work with my impact driver. The magnet on these is very strong and will hold your bits good.
1046571
I used this little gadget right away and darn if it doesn't work as advertised. Really helped converting my impact drill so I could use it with standard drill bits. Buy this device or buy impact driver drill bits. This thing is cheaper. No problems with slipping or not holding well.
2860869
I bought this as a quick power tool when working on cars. I mainly use it for small bolts sizes like 8mm - 15mm. It is very strong though, so you have to be careful when driving in nuts and bolts because it has enough torque to strip things. Very handy and is fairly lightweight. As with most buyers of this particular impact driver, the only gripe is the fact that the led only comes on with the trigger squeeze and goes off immediately if you let go of the trigger. Other than that, there are no complaints. Economical on power too. On Ryobi's normal battery, it will last 3 days or more on a single charge with normal use. I like the styling and the rubberized grips make it hard to drop or slip from your hands. Even though I had one gripe for it, it still gets my 5 stars. GREAT BUY!
851904
This replacement battery for my Craftsman impact driver works very well.
1340881
I have an older Makita impact driver that still works great, but both of the batteries were worn out and wouldn't hold a charge anymore.  I bought two of these batteries and they work great and are at a fair price.
3752764
i was set on buying a dewalt 20v max 3/8" cordless impact until i found out about this.  it performs very nicely considering that it costs just a fraction of the price of the dewalt.  i have 3/8" and 1/2" socket extensions, and put this impact to work on cars.  It has no problem knocking loose lug nuts that are torqued to ~85 lb-ft of torque.

the only thing that I really dislike about this impact is its outer design.  all the techy designs on the outside make it a pain to clean since dirt and oils easily get stuck in between all the etches of rubber.  Pro tip: use a wetted Mr. Clean magic eraser, or some other melamine sponge substitute to quickly clean up the impact after use.
4928158
It is a nice set to use when you are dealing with tight spaces. The impact driver delivers more than enough power when you are working in those tight to reach places and don't have enough room to maneuver. It by no mean replaces the larger variants but is a great situational tool combo.
3183322
Love these little adapters, makes taking out nuts and bolts a breeze with an impact driver
17847
Great product. If you use with Impact drivers, the lock/unlocking mechanism for the bit will definitely break.

The company states these are ONLY supposed to go on Rockwell Products. They were hesistant to service my broken product, but eventually sent me a replacement for which I am thankful and hence the product & support deserve 5 stars.
3943657
I've been really impressed with this, especially for the price. It doesn't have the power of a true impact driver, but it definitely works for DIY projects. Fits the market for Bolt-On/Matrix well.
1368789
Nice screw driver,  but inoperative/junk as impact driver so waste of money. It would not loosen vintage suzuki dirt bike engine crankcase screws after multiple attempts hitting until exhaustion. Does not turn when hit with hammer.  Found JIS 3 copy socket bit to install on cheap harbor frieght impact driver and removed all twelve screws with ease.
3560373
This is my favorite tool by far.  I often think I need to use an impact driver and after 15 seconds of it clacking at a long screw and I get super annoyed with all the noise.  I switch to this and it's done way quicker with none of the noise.  It just has a ton of torque for a small package.  Last week after Hurricane Irma my carport needed repair.  I had to sister a 2x6 up to the old one.  Using 3" Spax screws it was done with no issues.  Again I thought I needed the impact driver to get it done, nope.  This did it with no issues.  Even in a pinch (isn't geared for speed so it chugs on some heavier jobs) some quick change drill bits can be used and it's a very versatile tool.
2359756
I don't know how many years impact drivers have been available, but I used my first last year on a Rebuilding Together project where the lead contractor had one.  When I think of all the buggered screw heads I have created with my big, high torque drill, I almost weep.  The impact driver does the job without fuss, never messes up even stainless steel screw heads (ss is softer than "regular" screws), is light weight, and in general is a joy to use.  The 1/2" drill and flashlight were just a bonus for $40.  Get one, you won't regret it.
14152
I use this little beast daily in my impact driver that I carry on my tool belt. It has allowed me the use of many bits without the need for a regular chucked drill, therefore I can still utilize my impact for quick screw driving.

Build: It has a little heft to it, despite its size. The outer body is tough plastic, but the quick-connect (of course) as well as the tri-clamp and collar at the tip are all steel. The quick-connect shaft is chamfered/rounded enough to prevent debris in your impact connection from completely jamming it The shaft has also stood up to the impact of drilling 1 inch holes in a steel junction box with a metal hole saw. I have dropped this unit plenty of times and it actually shows no damage. I am impressed by the rigidity of it and have no doubt it'll last me years.

Ergonomics: Small, decently lightweight, and textured so you can crank down the chuck. Your bare hands may slip a bit and require a wrench for assistance, mainly with smooth shank bits. My hands are usually gloved so it is easier, but at times when drilling with small bits, I still use my channel locks (slip joint pliers) to tighten the chuck and prevent the smooth bit shaft from rotating. Lastly, the unit itself may be small but the overall length it adds to your driver makes it a bit awkward, leaving this as a specialty tool. The distance between the body of the unit and where the quick-connect actually engages your drill is about 1/2". That brings the total length to 2 1/2" for this attachment protruding from your impact, not counting whatever bit you add to this unit. Not a bad trade-off considering the advantage.

Overall: Highly recommended to any tradesman or hobbyist wielding an impact driver. This attachment has saved me so much time and has paid for itself over and again. Hitachi makes quality products as long as you can verify WHERE it is made. My particular model was made in Germany, which speaks for itself in quality.
479975
I received this driver free of charge during promotion with purchase of milaukee multimeter(great product too).  I recently began using it after owning for a year, did not properly charge batteries during down time and they still last very long time, I service pressure washing equipment and use it daily as a nut driver and socket wrench and only have to charge every few days or so. It isn't an impact driver, but you will be pleasently surprised by the torque this compact driver will deliver.