I have a (cheap) hammer drill that's fine for driving wordscrews of various flavours and drilling holes (ie can use screwdriver bits and twist drills). It has a setting for "hammer" that I *guess* may be for use with the old-fashions Masonmaster bits for drilling concrete/brick etc. I never use that now as I have an SDS frill which does that. That's a kind if "impact" setting isn't it?
So, does an impact driver also drill holes :-) Seriously though folks what is it used for (as they seem quite expensive). What can I do with an impact that the hammer drill does not do. v.m. thx.