Review on CTA Tools 7470 9 Piece Filling by Quartreal Eagleman

I'm a mechanic and bought to cover all the different models I work on. On Honda K-Series engines, the included adapter is oversized and hits the valve cover. There is no adapter for the new Chevy 4 cylinder valve cover. Tried using it on 3 different cars, none worked. Rejected, useless. Useless product and useless seller. You will not take it back.