A Set-in neck is a method of guitar construction that involves joining guitar neck and body with a tightly fitted joint, secured using some sort of adhesive. It is a common belief that this yields a stronger body-to-neck connection than a bolt-on neck, although most luthiers agree that a well-executed bolt-on neck joint is equally as strong, and will have similar levels of sustain and neck-to-body contact. However, neither of these joints is as strong as a neck-thru body construction, which requires more material and is usually seen only on high-end solid body guitars.