Zero Glide - ZS-13 Slotted Replacement Nut for Classical Guitars Bridge Doctor You would then tune the

You would then tune the guitar up as usual

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using the plastic post

The locking mechanism also improves your guitar's tuning stability

The E tuning is set with the traditional tuning button whilst the low position is set using the small thumb screw on the tuner body

Zero Glide - ZS-13 Slotted Replacement Nut for Classical Guitars Bridge Doctor You would then tune theZero Glide ZS 13 Slotted Replacement Nut for Classical Guitars ZS 13 Zero Glide This Replacement Nut System borrows the "zero fret" concept to reduce string contact in the nut by up to 93%. This will increase your guitar's tuning stability, playability and open string tone. It only takes a few minutes to install with absolutely no permanent alteration to your instrument. For Classical Guitar.