JS22-7 Dinky DKA 7-String Electric Guitar Satin Black. The Jackson JS22-7 DKA Dinky JS Series seven-string packs a huge punch for the price. It features an arch-top basswood body, bolt-on maple neck, 16"-radius rosewood fingerboard with 24 jumbo frets and "piranha" inlays, 26.5" scale length, dual high-output Jackson humbucking pickups, single volume and tone controls, direct-mount hard-tail bridge and die-cast tuners.