Chrome - LP-Type Bridge. Chrome.Zinc saddle and base plate.10.4mm String spacing. Traditionally referred to as “tremolos” these units have, technically speaking, been misnamed for over 50 years. At GUITAR TECH, we prefer accuracy.Tremolo is amplitude modulation; Cyclical changes in perceived volume. The pitch change caused by the devices traditionally referred to as tremolos, is actually VIBRATO, hence our use of the term.