The legendary Bigsby vibrato features a string mounting bar floating on low-friction needle bearings, for accurate return to pitch. Each model has a cast aluminum frame and stainless steel arm. Bigsby's original aluminum rocker bridge is available separately.
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Bigsby model B7: With string tension bar, for thin (1-1/2" to 2-1/4") solidbodies and archtop guitars. Mounts with six supplied screws; two attach to the guitar top. 1-5/16" upper mounting screw spread; 15/16" lower mounting screw spread. Strap button slot is 1/2" x 5/8". Distance from center of hinge to string tension bar is 7".