The Lo Pro Edge is a double locking tremolo that was first introduced in 1991 in six and seven string form that was fitted on selective high-end guitars except (RG5xx, RG7xx, JS and FGM) which continued to have the Original Edge. In 1992 it became the standard tremolo for all high-end models. In 1997 selective high-end RG models reverted back to the Original Edge. The Lo Pro was discontinued in 2003 in favor of the Edge Pro.