Hipshot 4 string Supertone 2 point bass bridge. A direct replacement for 1967 to 1973 Gibson 2 point bass bridges (e.g. Thunderbird, SG Bass, etc.) using the existing hole pattern. Features complete adjustability for precise intonation, independent string height and side-to-side string spacing. Includes: (2) 5/16-20 hex cap socket screws and (2) hex/allen keys: 1/16” and 5/64”