This is a clamp lock wire connector set of one 2-bit unit and one 3-bit unit. Either 2-bit or 3-bit unit has a dual clamp design, convenient for tool-free connection. The max withstanding voltage of the material is up to 380V. So you can use it on household grid projects. Features Tool-free connection Safe & reliable CE certificated Specifications Withstanding voltage & current: 10A/380V Dimensions(per bit) : 20*7.5*8mm