This is a MASTERY BRIDGE M2. Although it's an M2, it only comes with USA-spec posts. Replacement posts for JAPAN specifications are not included. Therefore, it's essentially an M1. I used it only once, then removed it and stored it. It's practically unused. Only the box, the bridge itself, and the bag are included. Replacement posts, the instruction manual, and the hex wrench are not included. Thank you. Mastery Bridge Jazzmaster Jaguar Mustang jazzmaster jaguar mustang fender fender