I have no idea who made these bass tuning machines but they’re excellent and never used, never on a bass. They are of an unusual type, with beautifully die-cast housings, “JAPAN” on their backs, an indication of high quality. Four-on-a-side style, each one can be adjusted for tension with an Allen wrench (included), and mount with three screws each. Four on a side, compete set, perfect for replacing old worn-out tuners or for that fab project you’re working on. Everything you need is included. $49