This is a Mastery Bridge M2. It's a bridge that can be installed on models like the Fender Jazzmaster, Jaguar, and Mustang. There are two types of posts: inch and millimeter. Please check the images for the included accessories. This is a used item, so please refrain from purchasing if you are overly concerned about its condition. No returns or exchanges, please. The body, neck, and pickups shown in sample image 7 are also for sale, so please take a look at those as well.