Review: Bosch PS41-2A 12v Kit - Cordless Impact Driver HQ
In testing, the Bosch PS41-2A was able to sink 3″ wood screws into pressure treated wood – a typical usage for an impact driver – in a 1/3 the time of some competitors, and didn’t struggle when going through knots. Other reviewers have mentioned how the Bosch could loosen nuts better than competitors in side-by-side tests. At a max rated torque of 930 in-lbs , this 12v offering is nearly as powerful as an 18v driver. The power comes in a small package, and makes this driver quite easy to get into tight places. (While we don’t doubt these trials, they complained that none of the tools lived up to their torque rating.
Both results are largely down to the pyschological 
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