Mastery M1 Bridge for Offset Electric GuitarThe Mastery M1 Bridge is a purpose built solution for offset guitar players seeking enhanced stability, intonation, and sustain. Designed specifically for American made offset guitars produced between 1958 and 2011, the M1 features proprietary mounting posts that integrate seamlessly into vintage and used models without modification. Engineered with a unique, non rocking design, the M1 eliminates common issues associated with traditional offset