Spigot is the premium joint design — a thin internal carbon pin (the spigot) bonded into one section of the blank, with the actual blank halves meeting butt-to-butt over the pin. Found on most quality JDM rods, and there's a reason it's the joint style that ends up on serious builds.
What you get from a spigot joint is the closest thing to a one-piece rod that a multi-piece can deliver. The action is unbroken across the joint — the bend curve runs smoothly from tip to butt with no stiff spot at the join, the way you can sometimes feel on a put-in or put-over. The tip feel is preserved. There's no spec compromise for being multi-piece beyond the small additional weight of the spigot itself.
It's also the most expensive joint to manufacture properly. The pin has to be bonded precisely, the alignment matters, and the tolerances on the carbon work are tighter than on a sleeve joint. That's part of why spigot joints almost always appear on serious rods — if a brand has gone to the trouble of putting in a spigot, they've usually built the rest of the blank to match.
Care-wise, spigots want a touch of attention. The pin should be checked occasionally for damage, and a little rod-joint wax keeps the joint seating cleanly without binding. Done right, a spigot joint will outlast pretty much everything else on the rod.
If you're choosing between a spigot rod and a put-in or put-over option in the same range, the spigot is almost always the better build — you're paying for the construction, and that's where the construction money has gone. Any questions about specific spigot rods we stock, drop us a line or pop in.