OUR LUTHIER TOOLS ARE 100% ORIGINAL. For any questions or information, please feel free to contact. 




High quality aluminum H, I or reverse T fret leveling beam working under string tension. This is one of the very first designs by Rectify Master. It is our flagship! With this tools we have launched Rectify Master brand and the fret leveling with strings on™ campaign, back in 2010. It is well known and respected among top luthiers and players. To level the frets with this system, all that you need to do is straighten the neck, slide it underneath the strings and start leveling. The system contains a special string lifter to unlock the movement of the tool keeping string tension as in playing condition and a Bonus set of gauges that will help you to adjust the neck in order to match with the tool. Bundle contains also a roll of #320 grit self stick abrasive. R.M.LITE type II (FRETRAIL) will be back in stock soon!


Standard lengths:

Guitar - 472.5 mm

Bass - 609 mm


youtubbe      acc_14 



RR Kit (reload/refinishing kit)

Reload And Refinishing Kit is all you need to reload the leveling tool and crown the frets after leveling them with one of our systems. The file in the Kit typically covers two or more fret level works. LittleBone #150 grit would last more than the LittleBone #400 grit but it would also leave deeper marks to refinish. Advise when you contact if you prefer LB150 in your Kit, instead of the LB400.


It contains:

-1 LittleBone Fret File #400grit

-1 roll 0.64mm x 2.9m self-adhesive abrasive #320 grit for reloading and refinishing (it replaces the little roll coming with the stand alone tool)-Masking tape for fretboard protection (2 sizes)

-1 abrasive fiber #600 grit for refinishing




*Kit is sold only with one of our fret leveling tools for additional US$38.


  • 1

Price list

REMINDER: to buy our tools please make sure to visit the How to buy page first. Thank you 

-Prices are in USD

-Shipping price is typical for 1 tool and 1 Kit

-RED is out of stock

-RR Kit is accessory (sold only with a leveling tool)

-Final shipping price may vary depending on volume, weight and final destination of the order

R.M.KATANA for guitar $225 +Shipping  $40
R.M.KATANA for bass $255 +Shipping  $50
R.M.nanoKATANA *uke $165 +Shipping  $36
R.M.BUZZ-Killer spot lev.  $80 +Shipping  $25
R.M.LITE for guitar  $40 +Shipping  $35
R.M.LITE for bass  $55 +Shipping  $38
RR Kit (reload/refinishing)  $38 Accessory  
LittleBone #400 grit  $25 +Shipping  $18
LittleBone #150 grit  $20 +Shipping  $18

LittleBone DoubleAngle #400 grit

 $28 +Shipping  $18
LittleBone DoubleAngle #150 grit  $28 +Shipping  $18

LittleBone DoubleGrit


 $28 +Shipping  $18
LittleBone ice #320 grit  $28 +Shipping  $18
LittleBone ice #150 grit  $28 +Shipping  $18
LittleBone ice Special  $35 +Shipping  $18
Digital Action Gauge  $34 +Shipping  $18
FRET RAIL mini  $18 +Shipping  $18
Feather File for nut   $20 +Shipping  $18


About Rectify Master

RECTIFY Master is a brand specializing in Fretboard Optimization. It focuses on research and development of quality setup systems for a more fluid playing, with over 30 years experience.




TOKYO, Japan

Copyright © 2010 - 2021 RECTIFY Master. All Rights Reserved.