Zero Glide ZS-3 Slotted Replacement Nut for Guitars (Common on Martin)

Zero Glide Replacement Nut Systems borrow the ”zero fret” concept to reduce string contact in the nut by 93%, increasing tuning stability, playability, and open string tone. Easily installs in minutes with no permanent alteration to your fretted instrument whatsoever. Available presorted to fit common string spacing and unslotted to fit everything else.