Hosco H-ZONE-H
Hosco Japan Zone File under-string fret rocker and diamond file, for higher fret area, 50x30x10mm. The Zone File is a unique tool that allows you to check the fret level while the strings are on and, if necessary, make adjustments with the diamond file on the fly. To cover the zone from the low fret to the high fret, four lengths were needed. For this reason the Zone files were designed in a trapezoidal shape; two files make one full set.