The JTK4 features a mahogany body bolted to a maple neck with a 22-fret rosewood fingerboard with offset triangle position markers. Components include dual Ibanez Artcore humbucking pickups and a Full Tune III fixed bridge with an Ibanez VBX60 Bigsby-style vibrato tailpiece. The JTK3 is a related model without the vibrato and with single coil pickups. The JTK2 is a similar model without the vibrato and with a pair of rocker switches which activate coil-taps of the pickups. The JTK4 was replaced by the JTK40 for 2009.