Just prepare a crimper,then you can crimp the male and female connectors and connecting wire in a few seconds without soldering.Save time and improve work efficiency. Make of Brass,which provide high conductivity,antioxidation,the insulation sleeves are make of PVC,insulated,safe and protect. After connecting the male and female connectors together.Then you can put on protective cover into.Flame retardant designs,safe to use. Perfectly for power tool and automotive applications.Whether you are working on your car cable,at homes,or on a scientific project,our cable connector ensures connecting properly. With a storage box and are easy to store and carry.Easy to categorize and store.