Excellent quality at an unbelievably low price! Even professional crimps of mini MQS Quadlock contacts are possible, e.g. in modern vehicles, because there is also an insert for 0,25mm in the set! Perfect connections are created, which are indistinguishable from the "original"! It is only important that you insert the pins with the openings upwards into the tool(possibly squeeze the strain relief straps of the pin a bit before), slightly "precrimpt" and then the (not too long) stripped cable introduces. Then squeeze the pliers completely and the perfect connection is finished! See my photos! Besides other types of plugs, you can also process veins end sleeves with this set. The little box is also very high-quality. Full score!