Original, made-in-USA, sand-casted Bigsby B7. The B7 model is best suited for thin electric guitars with more downward pressure. These vibratos have a roller retaining bar to give you an angle over the bridge if necessary.
Requires two holes to be drilled into the top of the guitar & four on the bottom where the hinge attaches to the body.
Spring, washer, and mounting hardware is included.