Set of 10 professional luthier Guitar Nut Files assorted sizes cut a smooth round bottom slot
MusicNomad's Diamond Coated Nut Files Help You File & Polish your Guitar Nut Slot or Saddle
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Guitar Bridge Saddle Nut Files Set - 13 Different Size Stainless Steel Needle Files with Circular Cross
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Is it worth buying these nut files? Less than $10. : r/Luthier
What nut files do you use? - Australian/New Zealand Luthiers Forum
3pcs/set Guitar Nut File Double Sided Nut Slotting File for Electric Guitar Tool | eBay
Amazon.com: Tarpop 3 Pieces Tapered Guitar Nut Files Nut Slotting Files Set Double Edge Fret File Electric Guitar Fret Tools Fret Crowning Files for Bass (Guitar) : Musical Instruments