this was good quality but it would not tighten all the way on my Floyd Rose bridges - the nut/collar would be all the way tightened on the threaded Floyd Rose special (and 2 other FR licensed bridges) and it would still allow the bar to have play and not fully tighten. The bar is on there, it just won't stay in place where you put it and it does not feel "tight". Ones that worked had a shallower threaded collar that put pressure on the bar and its plastic/nylon bushing to eliminate rattle and bar movement inside the bridge. Sturdiness and Quality seemed ok, the fit was where it was lacking - I wound up buying one elsewhere and it fit perfectly. So it IS either collar/nut is too deep, or something to do with the nylon bushing not being large enough, or possibly both).