These were to upgrade my Squire Affinity JB 5 string which was a present for me. Thomann were great as they were able to source the fifth machine head with the same orientation as the other four. I must say, that it took some modification to the headstock to get them fitted so if the holes are different on your bass you may wish to get these professionally fitted. The bass now has new Machine heads, new Pickups, new pre amp and new Pickguard. A bit of a project for me but I really like doing this to a cheap bass to get the upgrade