Very nice!! Are those from Nichols? How do they install? My tuners do not have the screw on the end like some tuners do.
I got them from the Classifieds on another acoustic guitar forum, but Nichols offers a similar product, I do believe. Installation is simple. Detune your guitar to take the stress off the tuners, unscrew the small screw on the end of the tuning button, put on new tuning button, screw the screw back in, retune. Voila. Takes about 5 minutes.
If your tuners do not have screws on the end of the button, you may not be able to do this modification without replacing the tuners. What kind of guitar do you have?