There are several brand-name manufacturers that make tuners for Mandolins. See this discussion thread at Mandolin Cafe for some thoughts on the relative merits of each.
For brevity, however, I have complied a list:
- Alessi (the “Platinum Standard” — the Ferrari, because of the quality, the hand-building, and the $$$$price)
- Rubners (the Audi)
- Waverly ( “Gold Standard” of mass produced – the Camaro) (Owned by StewMac)
- Schaller (Gold-plated standard — the quality difference is huge and obvious once you look below the surface. They are good but never excellent. The Honda Accord/Toyota Camry.)
- Gotoh (Gold-plated standard — the quality difference is huge and obvious once you look below the surface. They are good but never excellent. The Honda Accord/Toyota Camry.)
- Grover (Gold-plated standard — the quality difference is huge and obvious once you look below the surface. They are good but never excellent. The Honda Accord/Toyota Camry.)
- (Stew-Mac) Golden Age (?? not highly regarded…, especially considering the price)