Neck-through-body construction

This JJ Hucke Antarctica model has neck-thru construction with no discernible heel. This greatly facilitates high fret access. The neck is flamed Maple & Purpleheart while the "wings" are Poplar.
Two headless .strandberg* Boden Plini model guitars with differing construction methods. On the left is neck-through construction with a quartersawn Roasted Maple neck and Swamp Ash wings. On the right is chamfered bolt-on quartersawn Mahogany neck and Mahogany body. Both necks have carbon reinforcement strips.

Neck-through-body (commonly neck-thru or neck-through) is a method of electric guitar construction that combines the instrument's neck and core of its body into a single unit. This may be made of a solid piece of wood, or two or more laminated together. The strings, nut, fretboard, pickups and bridge are all mounted on this central core. Additional body side components (if any) that fill-out its shape are glued or mechanically attached to this central core. These are referred to as "wings". The construction technique is also used on electric bass guitars.

Neck-through-body construction is considerably more expensive than the traditional glued set-in neck and bolt-on neck style construction methods. However, it's less costly than the very rare and difficult "one-piece" fabrication out of an entire instrument fabricated out of a single piece of material.