Wide Application: Extremely helpful wiring accessories for radios, stereos, loudspeakers, lights, fans or other electric appliances. Practical to meet various electrical maintenance needs in homes, offices and cars. Easy to Use: First, remove the insulation of the wires with a wire stripper. Second, twist the wires together. Last, insert them into a and turn it clockwise until the wires are secured. Never fall off easily once installed. 5 Sizes & 5 Colors: Totally 50 wire caps in 5 different sizes (10 for each). Perfect for the wires with a gauge of 10 to 22 AWG. Each size of the caps comes in a color, making it really easy to distinguish and organize in daily use. High Security: Rated voltage: 300V; Max. tolerable temperature: 105℃. With strong springs inside, the wire nuts fix cables more firmly than electrical tape does. Thick insulating plastic shells stop electric leakage. and stabler conduction. Portable Wire Connector: Super and compact for convenient carry. Great to be used indoors or outdoors without adding extra burden to your bag. A must-have for or professional electrician.