Kluson MLV6LN Nickel

I swapped out the original Harley Benton tuners for these and while I had to drill the holes bigger to make them fit, which I hadn't expected, I did get them installed and the guitar stays in tunes fairly well.

I particularly like the sturdy feel of these tuners and how smooth they are to turn. The locking feature is really nice as well, although I think there's some sharp edges in there as I managed to snap the first string when I tightened the lock too much, but I haven't had that issue since and I've used them for around a year now.

They're not flawless, but at this price point I don't think you can beat these as they are really quite nice and work as advertised.

I installed these to Harley Benton ST-62 and it was an easy swap, no drilling or reaming needed, just remove the screws, swap the tuners and put screws back. Compared to the original tuners these feel orders of magnitude better. Tuning is more precise and holds better and swapping strings is very easy. You can tighten the string with 5 eurocent coin which is also a downside, I would prefer using some real tool like screwdriver, but the gap is slightly too wide for that. Also I prefer closed type tuners to these because these produce some resonance by vibrating against the metal ferrule. But all in all, a very recommended upgrade for vintage style tuners with ~8mm holes.