Set-in neck

Sonic qualities often attributed to this style of neck joint include a warm tone, long sustain, and a large surface area to transmit string vibration, leading to a "live" feeling instrument.

But hard physical evidence for any of these is lacking, and the attribution of long sustain has been definitively contradicted by experimentation.

It is a common belief that this yields a stronger body-to-neck connection than an inexpensive mechanically joined bolt-on neck.

There's also a third method, neck-through construction, which requires more material to provide an even stronger connection.

With hollow body set-in neck electric guitars of the 1940s being rather expensive to buy and repair, newcomer Fender in 1950 introduced electric guitars that were easier to manufacture, combining a simple solid body with a bolt-on neck.