The best upgrade I know of for an import or American Fender® Strat or similar guitars with string spacing of 10.5mm or wider. Yes 10.5- these will fit Imports AND USA guitars.
You get six beautifully cast STAINLESS STEEL bridge saddles, complete with screws, springs, hardened steel height adjustment screw- all ready to assemble. These are a perfect fit for USA spacing.
When replacing the pot metal saddles on a typical Asian guitar you'll immediately notice the big ballsy tone, the endless sustain, and the tremendous string response.
There's no cheaper way to breath some TONE into your guitar. These also work on Tele humbucker bridges and Strat hardtail bridges- if your saddle has a center mounted screw and the strings go through the body- these will fit!