StewMac Gauged Nut Slotting File.010in Width - Precise Nut Seating

In this review the StewMac Gauged Nut Slotting File.010in width is examined for luthiers and serious hobbyists who need precise, repeatable nut and saddle slots. The bottom line: this is a compact, professional-grade slotting file that reliably produces round-bottom slots so strings seat cleanly without buzzing. Its tempered edge-cut design and twin cutting edges make quick work of bone, synthetic and metal saddles, and the.010in gauge is useful for light treble strings where accurate fit matters.

Key Features

• Tempered edge-cut profile: Produces a true round-bottom slot that helps strings settle and reduces buzzing at the nut.
• Chrome-alloy steel construction: Stays sharp under shop use so the file cuts consistently through bone, synthetic materials and metal saddles.
• Twin 4in cutting edges: Gives two usable faces per file, extending service life and allowing different cutting angles.
• Gauged.010in width: Matches light string gauges so each string gets a snug, appropriate slot without excessive material removal.
• Professional shop quality: Sized and finished for repeatable results, making it suitable for busy repair shops as well as home luthiers.

Who It's For

This file is aimed at instrument technicians, luthiers and dedicated hobbyists who routinely set up guitars and need accurate nut and saddle slots. It is especially useful when working with light treble strings or precise saddle slotting where a narrow, round-bottom slot is required.

Less suitable users are those who only occasionally adjust a nut and prefer a multipurpose or cheaper tool, or players who never touch nut slotting. If you need a broader range of gauges, consider purchasing a set rather than a single.010in file.

Pros & Cons

Pros

• High build quality gives clean, accurate cuts that help eliminate string buzz.
• Tempered edge-cut shape produces the preferred round-bottom slot profile for nuts and saddles.
• Durable chrome-alloy steel and twin edges extend usable life for shop environments.

Cons

• Single gauge means you may need additional files for other string sizes; some users find the price high for a single file.

Specifications

Brand	StewMac
File width	.010in
Material	Chrome-alloy steel
Cutting edges	Twin 4in cutting edges
Intended use	Nut and saddle slotting, including metal saddles
Edge profile	Tempered edge-cut, round-bottom slots

Our Verdict

The StewMac Gauged Nut Slotting File.010in is a precise, well-made tool that suits professional techs and serious hobbyists who need clean, round-bottom slots for light strings and metal saddles. It represents good value if you require repeatable accuracy, though those needing multiple gauges should budget for a set.

Frequently Asked Questions

Can this file be used on metal saddles?
Yes. The chrome-alloy steel edges are suitable for cutting round-bottom slots in many metal saddles.

How do I choose the right file size?
Pick a file the same size as your string gauge or a few thousands larger; a slightly smaller file can be rocked to widen a slot.

Will the file hold its shape in a shop?
Customers report mixed notes on thickness and shape retention, but overall the tempered steel construction provides good durability for regular use.