colin:
Will you have to buy a set or 3/4 inch drive impact sockets to go along with this bargain? $$$ Unless you already have a set and are dying to break out your "big guns" it doesn't sound like such a great deal to me either...
Previous posters are absolutely right about half inch models putting out more torque in a much friendlier format.
An IR2235 is rated at 930 ft-lbs of max torque. This 3/4 drive is rated at 1100 ft-lbs of max torque, making it significantly stronger (170 ft-lbs).
1/2 drive impacts are often advertised by nut busting torque (marketing BS) where as 3/4 drive impacts are rated by the more practical and useful max or working torque number. The marketing by IR/Snap On/Chicago Pneumatic/Aircat/etc is paying off as people actually think their 1/2 drive impacts are just as powerful as a 3/4 drive.
The 3/4 drive will hit harder per impact too, and the extra weight of a 3/4 drive socket will make the torque output even higher.
Ultimately, that means the "nut-busting" torque of this 3/4 drive impact would probably be around 1500-1600 ft-lbs or maybe even 1700 to the IR2235's 1300.
Is it enough of a difference to justify the new price for a 3/4 drive impact? Depends on how much you need that extra power/which model 3/4 drive impact you look at. For $40 for the OP, that's a damn powerful impact for super cheap.