For long self-tapping screws up to 6 mm in diameter - it is the most, and it is not critically heated. Capercaillie thick - obviously not his path: you need to either drill, or take another tool, because he does not pull them and gets very hot. So it's a good device for professional use, but don't expect miracles from it. It is not particularly applicable for everyday life, because few of the same summer residents not only know how to use it, but generally represent the principle of work. Yes, use quality torsion bits - ordinary ones, even good ones, he just EATS! Like any impulsnik, however.