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Hosco Groobar. Groobar is a 4 piece set of hardened steel gauges to prevent cutting nut slots to deep.
Anyone can file the nut slot exactly to the target, so we recommend Groobar to all luthiers, repairmen and workers from an amateur to a professional.
Set of 4 pieces
L 1.07mm (0.042")
L 1.27mm (0,050")
M 1.42mm (0.056")
H 1,65mm (0.065")
Hosco Groobar. Groobar is a 4 piece set of hardened steel gauges to prevent cutting nut slots to deep.