These Graph Tech String Saver saddles are mounted on my Mexican strat, and I'm very happy with them.
They are solid, sturdy and most of all, they don't rust! As a man who perspires a lot, it is very positive, they don't show signs of rust after a couple of gigs.
When i got them and put them on my guitar. they were a perfect fit, but make sure you measure the old ones, before buying new ones, so you'll get the right size.
I replaced the myself without any trouble whatsoever. It's incredibly easy to do and your guitar will benefit immensely by getting Graph Tech String Saver saddles. Not only in tone, but also in feel and playability.
Well, that's what I experienced.
All in all, a fantastic product without any hassle, and I'm getting these for my Tele! :D