Fret Specs Pro is a fret calculator for the stringed instrument craftsman and luthier Guitar makers will find this program very handy for custom scale length guitars. In the program you enter the scale length and how many frets and Fret Specs Pro will output the measurements . Fret Specs Pro includes Nut to fret spacing as well as specs for fret to bridge. Some features are not included in the demo. The demo version is just for trying a few features that are in fret specs pro .Fret Specs can be purchased for $15.00 through Pay Pal from our website, and will include updates when we add more features to the program. Runs on - Xp Home ,Xp x64 ,Vista,Windows 7 (32 or 64)