My best screwdriver is electric. It does a better job driving screws than anything I own, and can drive more screws deeper into harder wood than I could ever do by hand. Hitting it hard with a hammer will do damage to it. It's still a better screwdriver than any of the ones that would be unharmed by the hammer.I'm not sure that,screw driver hammer comparison holds up, you can very much judge the quality of a,screw driver by if it bends when you hit it with hammer, a good quality screwdriver should be impervious to a few hammer blows, admittedly you are using it to compare screw driver not hammer against driver, but still!