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All information is subject to change without notice. The content of this pages is property of RECTIFY Master. RECTIFY/Master technology is patented, utility model and patent pending. RECTIFY Master® is a registered Trademark. Fret leveling with strings on® is a registered trademark. Fretboard and tool gauges™, R.M.LITE™, KATANA fret leveler™, Adjusting bow fret leveling tool™, BUZZ-Killer™, LittleBone all-in-one fret file™, Digital Action Gauge™, I-Lifter™, play cleaner - play faster™ are intended as Trademarks.