Fix a High Guitar Nut: Check Slot Height in Seconds

Your nut slots should sit at the same height as your frets — here's how to check it in seconds. In this full guitar setup walkthrough I measure fret height with the FRTLZR CutNutOrNot, then check each nut slot against that exact reference and file down the ones sitting too high. A nut that's cut too high is the hidden cause of fret buzz on open strings, tuning instability, and a stiff, hard-to-play first position — and you can't see it by eye. The trick the pros use is simple: your nut slot height should match your fret height. The CutNutOrNot makes that check fast and repeatable. I run through it here on a budget B-stock Harley Benton SC-550 Plus, measuring the frets, comparing the slots, and correcting the high ones with a file for lower action at the nut and cleaner playability. The FRTLZR CutNutOrNot is a precision nut slot checker — a diagnostic gauge, not a cutting tool. It comes in 1.0, 1.2, 1.4 and 1.6 mm, fits any toolkit or gig bag, and is Made in Germany. Whether you're a luthier dialing in client setups or a player fine-tuning your own guitar, it takes the guesswork out of nut slot height. 🔧 Get the CutNutOrNot (€14.90): https://www.frtlzr.com/products/cutnu... 🛠️ More precision guitar setup tools: https://www.frtlzr.com #guitarsetup #nutslot #luthier