I wanted to adjust Bridge Saddles but I didn't want to touch my original one.  So, I ordered this one.  I pretty much dropped the bridge to the original 4MM post that came with the guitar (Epi Greeny).  The saddles were pretty good but I had to file a few saddles so that strings would sit properly (1/2 diameter into saddles).  I had to widen the E and A saddles and pretty much file the height for the D, G, A, and E as it sits too deep into the saddles.  The results are amazing, gained sustain and clearer sounds with the same string height set at lower E at 0.04" and 0.06" on high E.  It sounds very close to the Gibson Les Paul standard now.  I recommend it for those who want to tune the Tune-O-Matic bridge!