B3: Hand made original. The B3 unit works best on thin hollowbody archtops. The only holes that need to be drilled are the four at the bottom of the guitar where the hinge attaches to the body. All mounting hardware is included.
B5: Hand made original. The B5 model is best suited for flat top solid body electrics such as SG's, Firebirds & Les Paul Jrs that have a stud mounted Tune-O-Matic style bridge. Requires 4 holes to be drilled in the top of the instrument. All mounting hardware is included. Made in USA.
B6: Hand made original. The B6 model is best suited to be used on the large archtop guitars. The only holes required to be drilled are the three on the bottom of the guitar where the hinge attaches to the body. All mounting hardware is included.
B7: Hand made original. The B7 model is best suited forthinarchtophollowbodies & solid body electrics. These units have the roller retaining bar to give you the angle over the bridge that is needed. Requires two holes to be drilled into the top of the guitar & four on the bottom where thehingeattaches to the body. All mounting hardware is included. MadeinUSA.