The Buzz Feiten Tuning System solves tuning and intonation problems with 2 simple steps:

1. Shelf Nut
Our exclusive Buzz Feiten Tuning System¨ (BFTS) Shelf Nut moves the strings closer to the first fret according to our Patented Formula. This eliminates sharp notes at the first three frets.

Buzz Feiten Tuning System Shelf Nut


Top View : Each Shelf Nut is precision machined from high quality bone for superb tonal response. Our Lightning Bolt Logo is machined into the top of each Shelf Nut for authenticity.



Side View : The strings are moved closer to the first fret a precise distance based on the scale length, fret width and string gauge of your guitar. The slight overhang of our nut (the 'Shelf') does this without altering your guitar in any way. So it's even fine for vintage guitars.

2. Intonation
Your guitar's bridge is adjusted according to our Patented Pitch Offsets, creating balanced intonation over the entire fingerboard - every fret - every string.

Your Bridge Is Adjusted to BFTS Pitch Offsets
Retrofit your guitar or bass with the Buzz Feiten Tuning System More than 700 BFTS Authorized Retrofitters are trained and certified to Retrofit your guitar or bass.

Guitars Retrofitted with BFTS

• Play in tune from the first fret to the last
• Our exclusive Shelf Nut is made from the highest quality bone for superb tone
• Your original bridge is used so your action and tone are unchanged
• Tune by ear or with ANY electronic tuner of your choice
• Korg and Peterson Tuners with BFTS Mode offer fast and accurate tuning
• Our Non-invasive Retrofit does not change your guitar in any way
• Works perfectly with alternate tunings, capos, zero frets, locking or roller nuts and tremolo systems
• Every Retrofit includes our Shelf Nut with Lightning Bolt Logo and a Serial Numbered Authorization Sticker for authenticity
• Suggested retail price to retrofit your electric guitar or bass is only £79