© 2019 by GMC Luthier Tools

In addition to our custom multiscale jig service, we have several jigs in stock which can be purchased from the drop down list.



        Scale:       Level       Spacing:             No.

Treble - Bass     Fret       Nut - Bridge       Strings   

24.75" - 25.5"    8th     34mm - 55.5mm      6

25.5"   - 27"       8th     40mm -  63mm        7

25.5"   - 27.5"    9th     36mm -  54mm        6

25.5"   - 27.5"    9th     48mm -  74mm        8


The designation of each option identifies the following characteristics:


  • Treble Scale (inches)
  • Bass Scale (inches)
  • Perpendicular/Level Fret Position
  • Nut String Spacing (mm)
  • Bridge String Spacing (mm)


The supply includes:

  • Multiscale Template.
  • Jig Base.
  • 2x Fret Slot Locators.
  • Luthiers Fretsaw.
  • 5x Spare Fretsaw Blades.
  • Allen Keys & Fixing Screws.
  • Instrument Setting Out & Bridge Position Gauge.



The jig is now supplied with an Instrument Layout & Bridge Position Gauge:

The gauge provides a valuable reference tool for the whole of the instrument build. The gauge sets out the nut and bridge positions / angles, treble scale, bass scale, overall string spacing and their relationships to each other - with reference to the centreline of the instrument.



The multiscale template is a specially designed channel which rests directly on top of the fretboard and is fastened in position via screws along the sides of the jig base.

During sawing, the blade is guided in close fitting parallel slots and the saw teeth pass through notches at the sides of the template.

Fret slot depth is achieved when the blade back contacts the top surface of the template. (The fretsaw supplied – 4.0mm depth – includes an allowance for the template thickness).

The fixing screw slots enable height adjustment for different board thicknesses.

For reference, the template has fretboard centreline marks at each end.

The jig is sturdy and can be solidly clamped in a bench vice for stability.

The jig base also accepts our standard slotting jig templates for conventional Short Scale, Long Scale, Baritone and Bass Scales.



The jig base has a ribbed top to help restrict movement of the fretboard.

The fretboard blank width should be trimmed for a snug fit inside the jig base side plates.

If there is excess length on the board then this can be utilised for clamping over the top of the template (at the end portions of the jig only - see photo above).



Custom multiscale jigs can be made to order.

The following details will need to be confirmed prior to ordering. 


'A'  Overall Nut String Spacing

'B'  Overall Bridge String Spacing

'C'  Treble Scale

'D'  Bass Scale

'E'  Perpendicular Fret Position

'F'  Number of Strings

'G' Fretboard Width


Please see the diagram for clarification of these requirements.

(Shippng for custom orders is approx 6 weeks from receipt of your requirements).

MULTISCALE FRET SLOTTING JIG - Including Layout & Bridge Position Gauge

  • "Received the goods. Beautiful tool and workmanship. Thank you for your service". Miguel A., Puerto Rico.


    "We are really happy with the multiscale templates that you provided us". Giulio S., Bologna, Italy


    "It is splendidly crafted and I am very delighted with it . It was very easy-to-use and understand and in just an hour's time I was able to accurately slot a multi scale fretboard. Once again thanks for your craftsmanship". J. S., Guaynabo.