Low Voltage Wire Connectors, Solderless No Wire Stripping 3 Way 1 Pin Small Gauge Wire Connectors, Easy Connection T Tap Connectors, Fits 24-20 Gauge Wires, 16 Pack

Great product

Perfect solution to ground the wire inside a BMW E90 adaptive HID headlamp to retrofit to a 328i with factory halogen lamps.

Clip did not work on wires I was using. Not sure if the wire was too thin, but would not strip the plastic to contact metal. Was not able to use and went with soldering contacts

Found that the base of the T is difficult to open, need to use a small screwdriver to pop it open. Re waterproof, not unless the wire insulation is large enough to seal off the connection.

These made wiring my backup camera a sinch. However, some of them arrived already 'closed' and I'm not sure the best way to reopen them.