The first version appeared with a distinct "Strat" logo in the headstock, 24 medium jumbo frets (i.e. these are thicker and wider frets), a maple neck with rosewood or maple fingerboard and with one of the four neck "bolts" (screws) off-set at the bottom of the neck to allow a more comfortable "heel" area for playing in the upper registers, a lighter basswood body, or occasionally alder for US made guitars). The scale length is an even , rather than the normal commonly used on Stratocaster and Telecaster guitars. In addition, the Fender HM Strat had a Kahler licensed double-locking tremolo system, "Spyder", and Gotoh tuners, one DiMarzio humbucking H* "Super 3" pickup ("H" configuration), and sometimes two single coil pickups (S*, HSS configuration), two humbuckers, or sometimes a single additional Super Distortion, (HH configuration) and a side-mounted jack socket. Kahler USA offers a detailed schematic diagram of the Kahler Spyder tremolo and several (but not all) replacement parts are available.