I changed the licenced tremolo of my Jackson DK2 dinky MIJ and now feels like made in the USA, it not only feels better, it makes your guitar sound different! it improved the sustain, the low and high frequencies that were not heard before now explode in definition, it also eliminated the flutter effect when hitting the strings hard which is very common in cheap licenced tremolos, the improvements overcome the cost of this bridge, the quality of this product is amazing,