The Hot Rodded Humbucker? Set matches an SH-2n Jazz Model for the neck position with and an SH-4 JB Model for the bridge position. This is Seymour?s favorite humbucker set and is widely used for everything from aggressive blues-rock to metal. Seymour Duncan makes a lot of pickups. So, to make the choosing easier, they"ve released their most popular pickup models in pre-matched sets. This takes the guesswork out of determining which pickups work well together.