Haven't used it since it arrived and these are some observations. The product brochure is rubbish - basically see yourself for the specs. There is no mention of a selector switch for using a hammer or drill. No trigger lock as advertised. No statement about changing the brushes. Nothing about the included lube or reservoir refills. I think you get what you paid for. Looks like I'll be tutored at home on usage and other aspects. good luck to me