Do these work on both stranded and solid wire?

They only work on stranded wire.

Is this the best size for working inside cars (stereo, reverse cam, etc)?

Yes. These uses typically use 18 gauge to 26 gauge wire

Can these be used for outdoor connections?

You can use them outdoors but they are not water proof so water can leak in and cause corrosion. One way to stop or limit this is to attach the wires and then apply silicone or other material to the ends. I really like using this connection for wiring aftermarket stereos. It makes a really strong attachment between wires which is great a reducing shorts and other electrical problems and can be removed / reused if you modify your system.

Are these the connectors that connects like a T junction? Need to connect to a live wire without splicing or stripping it but cant see in picture.

The connectors in the picture require about 1/4" of bare wire to insert in each end so it is like a splice and it requires stripping the wire. Not sure your application but these will not allow the 2 wires to come apart and do not require crimping. They hold the wire like a banana plug (for speakers)

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🔗 Connect smarter, not harder — the future of wiring is here!

REUSABLE DURABLE - Designed for multiple uses, saving you time and money on replacements.
TRUSTED SINCE 1997 - Globally tested and OEM-approved for unmatched reliability.
EFFORTLESS INSTALLATION - Say goodbye to crimpers—just hand tighten and go!
BUILT FOR EXTREME CONDITIONS - Reliable performance from freezing cold to scorching heat.
UNIVERSAL WIRE COMPATIBILITY - Perfectly engineered for 18-24 gauge wires, covering your everyday needs.

Posi-Products Red 24 Gauge Butt Splice Butt Terminal Connector offers a superior, hand-tightened in-line splice solution compatible with 18-24 gauge wires. Engineered to withstand temperatures from -23°C to 120°C, this reusable connector has been trusted worldwide since 1997, delivering reliable, crimp-free electrical connections in a convenient pack of 9.

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€ 57.59

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Manufacturer	Posi-Products®
Brand	Posi-Products
Model	Posi-Lock
Package Dimensions	11.91 x 7.19 x 1.19 cm; 18 g
Item model number	600
Manufacturer part number	600
Item Weight	18 g

Posi-ProductsRed 24 Gauge Butt Splice Butt Terminal Connector

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