CONNECT WIRES EASY: The DC Connector Adapter Kit lets you connect open cables for all your projects without welding! You get not only a reliable connection, but also good performance. PRACTICAL: Plug andamp play! The connector is screwable and solderless. Unscrew the screws of the terminal with a standard slotted screwdriver, insert the cable and screw it tightly. DELIVERY SIZE: You will receive 10 DC plugs, each with a female contact and male plug and screw terminals made of sturdy plastic fabric and metal. They are 3.8 x 1.5 x 1.2 cm each, the inner diameter is 2.1 mm and the outer diameter 5.5 mm. GREAT CONNECTION: The DC connectors and jack adapters can be used for many DIY projects, such as for the power supply of CCTV security cameras and LED strips. NOTE: When connecting the wires, pay attention to the polarity. The positive and negative polarity is shown on the screw terminal connector. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.