Zero Glide - ZS-18 Slotted Replacement Nut for Basses Sperzel Locking Tuners magnetic soundhole pickup with a

magnetic soundhole pickup with a moderate output

The Bridge Doctor supplies an inlay to cover the screw head

They feature ceramic magnets for optimum performance and tone

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-18 Slotted Replacement Nut for Basses Sperzel Locking Tuners magnetic soundhole pickup with aZero Glide ZS 18 The Zero Glide ZS 18 Replacement Nut System borrows the "zero fret" concept to reduce string contact in the nut by up to 93%, increasing tuning stability, playability, and open string tone. It only takes a few minutes to install with absolutely no permanent alteration to your instrument. The ZS 18 is for bass guitars.