Kluson Vintage Style Tulip 3L/3R N

I've put these on an old Czech-made Epiphone. Had to ream out the tuning peg holes a little, but not much. The screws fit perfectly over the old ones, no modifications required there.

They hold tune great and were an easy install. A vast improvement over the old ones.

Just a word of caution: many people change the tuners in order to achieve tuning stability. Don't do that! If the tuners are otherwise fine, there's a 99% chance that your nut is causing the guitar to go out of tune. Either change the nut to a better material, or use some sort of lubricant in the nut slots so that the strings will not get caught in them.