Widely Used Connector BlocksWire connectors are suitable for 0.5-4mm/20-12AWG solid wire and 0.2-2.5mm/24-14AWG flexible wire. Widely used in building wiring, industry, lighting, security, communications and networking, etc. Instead of traditional electrical tape and intertwined butt connectors, technology innovation reduces wiring time by 60-70%. Easy to Use First remove the wire sheath ( 11~12mm), just push the orange clip upward slightly at 90, insert the stripped wire and press the lever to secure the wire. It can make a solid connection without any other tools needed. Each wire connector has a test hole, so you can check whether the terminal has power without unplugging the connector. SafeElectrical connectors are made of the best nylon PA6 modified flame retardant insulating material , which has long service life, no corrosion, anti-aging and 4KV pressure and against electric shock, much safer than traditional electric tape. The inner face is made of high quality copper with high conductivity. It can definitely prevent breakage during use. Reliable and ReusableCompact wire connectors can be managed separately for different wires, which prevents short circuits and fires caused by aging of the shifted frequency band of the wires. It can also be recycled. Meet your needsThis kit includes 110 PCS, PCT-212*55 PCS (2 ports), PCT-213*45 PCS (3 ports), PCT-215 *10 PCS (5 ports).