I bought this impact driver drill after testing for drilling of reinforced concrete with a 6 mm bit ... I was amazed (the seller of the store too) Since I can not do without me and I do not regret my old screwdriver unscrewing ... I'm so happy (I'm kind of yourselfer) I again bought the same for my son (who does not like tinkering ... but I think that is because it is poorly equipped ...) This screwdriver has a very high and truly impressive torque (the screwing force) and it also shows effective to drill ... I am convinced that this kind of tool is able to make people want to use a non-yourselfer .. :-)