I've used a few of these on my early instruments and I must say they're not as tough as Warwicks at more or less the same price.
Two of them broke in a shortest period so I stopped buying them. The finish isn't too bad but they definitely look, feel and perform cheap. Whatever's the price of your bass, you better steer clear of these things and buy Warwick tuners. Similar price but a whole different planet for real. I've never broken ONE while these really come apart if you look at them in the wrong way. Doesn't make much sense to me to price them like this. Maybe 4euro a piece?