VDE plug insert refers to the VDE laboratory in accordance with VDE national standard or European EN standard, or IEC International Electrotechnical Commission standards for electrical products for inspection and certification. In particular, plugs, power cables, connectors, wires and cables, circuit breakers, electromagnetic switches, and other products are widely applied by many manufacturers to represent the symbol of quality. There are three main types of VDE plug inserts. The first one is 2.5A two poles plug inserts. Usually, call it a 2.5A European plug insert. The second one is a 16A two poles plug insert, usually call it Holland plug insert. The third one is a 16A 3 poles plug insert with earth clip, usually call it Schuko plug insert.