Still faithfully Sand-Cast by Bigsby to original specifications, and as popular as ever for flowing, smooth vibrato effects. The Bigsby B5 Vibrato Aluminium "Horseshoe" model is designed for fitment to a flat top, solid body electric guitar. Extremely versatile, this classic tremolo is the perfect upgrade for a variety of guitars originally fitted with a hard tail bridge, and fits using 4 screws (supplied).