I'm after a cordless impact wrench but unsure what to go for?
All my cordless stuff it the 5.0 a/hr hitachi but the impacters all seem to take small bit holders for screwing screws etc!
Ideally I'm after a 1/2" drive impacter for wheel nuts/ front sprocket nuts etc!
Any ideas on a good quality/ reliable tool i can take to events?

All depends on budget I got this for work and regulary ripping m16 nyloc nuts off where the guy I work with bought the Millwakkie (not sure about the spelling) and they both do the same work
Click me

Small bit holder = impact driver
Half inch = impact wrench

Driver is OK for screws, no good for nuts. Peak torque isn't enough.

Is this the windygun you're looking for?

Hitachi WR18DSDL/L4 18V Cordless Impact Wrench (Body Only),
High tightening torque of 255Nm
Power mode for heavy duty work
Safe mode for smaller jobs (140Nm)
Only 173mm body length Slimline soft grip handle
Forward & reverse switch
White LED spotlight
Battery level indicator
1/2" square drive
Metal belt hook can be fitted to left or right side.
Socket not included

Last year I bought a mains impact wrench on a whim from Machine Mart. It has plenty of torque for most jobs and is probably more powerful than most cordless equivalents . To be honest though, I much prefer my Ebay cheapo Chinese 3/4" socket set that I bought around the same time . I recently undid a rear wheel bearing nut on a Ford Focus. 235nm, 173 foot pounds of torque with no trouble at all with it. Bear in mind that I have plenty of weight to put behind it, but it really allows you to apply a force that you can't get near with a 1/2" set.

I find that when I am working on a car, I like a bit of mechanical sympathy / control that you simply don't get with an impact wrench. Don't get me wrong though, on an old deeply rusted exhaust bolt when you are laid underneath a car, an impact wrench is a very valuable tool to have. However, a 3/4" socket set really allows you to apply a lot of force in a very controlled fashion and it shouldn't be discounted. If I had to choose between the two for a job and space for the lever was not an issue, I would choose the big socket set every time. Much, much cheaper too. Over the years I've bought quite a few tools that I thought I needed that I found out weren't really necessary. If I had to sell any of my tools, the impact wrench would go first out of the two.

[Edited on 21/6/15 by RichieW]

Or a sticking 32mm front sprocket nut!
I need an Impact wrench but if I could get a decent Impact driver with an adaptor to 1/2" square drive that would be better as I could use it at work too.

[Edited on 21/6/15 by daniel mason]

I've got the ryobi 18v one and its not up to your requirements.
(great for little stuff like m6 bolts but anything bigger then that and I have to get them started by hand).

Had one of these for years, battery starting to go now but gonna buy the same again. Just bought my dad one as his snap on one died. For the money it does the job well, gets wheel nuts on and off and also does clutch basket nuts!
http://pages.ebay.com/link/?nav=item.view&id=301499213938&alt=web

[Edited on 22/6/15 by MK9R]

I bought a sealey one a couple of years ago
Great piece of kit - 24v - fast charge and nothing on the westfield beat it yet