DescriptionThis adapter allows you to connect a barrel jack connector to bare wires.One end has screw terminals and the other has a 5.5×2.1mm, center-positive male barrel jack.If you need to connect bare wires to a barrel jack on an Arduino or a development board, this might be the simple solution.Brand new and high qualitySimply & Professional appearance for power cablingEasier for camera and LED light strip installation, save time and more securer cable connectionNo electrical tap, No splicing, no crimping, but only a small screw driver5.5mm x 2.1mm male power plug connectorInternal diameter of the plug: 2.1mmExternal diameter of the plug: 5.5mmSize: 3.5cm x 1.4cm x 1.2cm – 1.37inch x 0.55inch x 0.47inch