Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers overwhelmingly praise this file for exceptional sharpness, durability, and precision in fine finishing work. The dual-cut design—single-cut on one side, double-cut on the other—enables seamless switching between aggressive and fine finishing without dulling prematurely. Users consistently report it stays effective on tough materials like tool steel, aluminum, and cast iron. The compact 6-inch size and fine tooth pattern excel at detailed tasks including sharpening tools, smoothing edges, and removing burrs. Reviewers highlight its ability to produce clean, shiny finishes with minimal effort and access tight spaces. Many note outstanding value for the price and express intent to repurchase. A few mention minor inconsistencies, though most consider it highly reliable and worthwhile.
Customer review summary generated by AI, including incentivized reviews.Worked for me
It works just like a real file; I used it to remove metal I would have rather milled out - but I don't have a mill.
Good for Horror Movie villans
Sharpened a hatchet blade and machete. It's so sharp, Michael Myers is jealous
Verified Purchaser
Chainsaws
Would RecommendBought these for use with my chainsaws. They are perfect for what I needed.
Have only used it for a small job so far.
Would RecommendBought this for a job that required sanding/scrapping in a tight location. Did a wonderful job, professionally looking results.
No teeth on one side
Would Not RecommendCheck the file before you buy. The second one of these files I bought in a year had no real teeth on one side. The file would not cut at all on that side. Poor quality control.
Hi Hivoltage, we appreciate your feedback and will look into this. The file is covered by Kobalt's lifetime guarantee and can be exchanged at yo...

Nice file for smoothing edges
Would RecommendThe file is a nice size and easy to use. I sharpened my pocket knife with it and got a very sharp, clean edge very quickly. It is great to use it to file sharp edges down to make them smooth.
Need a Good Metal File
Would RecommendIt's a metal file and I've used it to sharpen tools and it works just fine.
A good little file, sharp, and clean
Would RecommendThis file is carefully packaged and a nice size that I will use for small detail work on my model railroad. The file was displayed in a fashion that I found favorable along with being covered in a plastic coating. I expect it to last as long and outlive me as the one it replaced was over 50 years old! Highly recommend it. Nicely sharp.
It does the job.
Would RecommendThis is a nice compact file that is useful for sharpening tools and filing edges off small items. It could be used with plumbing and finish automotive jobs. It can be used without a handle (not included), but is more comfortable and controlled with one. Fits nicely in a portable tool set.
A nice cheap file for small work
Would RecommendThis file is great if you have small jobs like light metal and wood. It’s a single cut with a smooth grade so if you’re looking to fine tune something it’s great. Not so good for removing lots of material.
Small and Effective
Would RecommendThe Kobalt 6” Smooth Mill File is a small file but very effective. I made a countertop in my laundry room out of melamine and added an iron on PVC taped edge. This little file is just the right size to control the angle of the bevel to make a smooth edge even with the countertop. A bigger file sometimes bites into the tape and either puts a mat into the tape or the top. This little file was easy to manipulate so that the edges were perfectly smooth when finished. The smaller size is great for st...
Good size, great for refined work and sharpening
Would RecommendThe 6-in Single-cut Smooth Tooth Mill File is my first single-cut file and I am impressed on how well it works for refining your cuts or sharpening your knifes. The file grooves are really fine, yet if pressed hard on the work piece very aggressive – they’ll smooth out any burrs from your cutting work. The 6 inch length feels the better choice for fine work - it’s not too long, neither too short, allowing for good strokes, working the entire blade’s surface and getting the job done quick. I us...
Perfect for small jobs
Would RecommendThis is perfect for the small jobs like sharpening shears or even tines on the tiller. The list begins with the best points 1. Has edges so you can get into small places. 2. Is cut so it works best on the up stroke only. 3. Perfect for keeping in the tool box. There is one thing that this should come with, a handle.

Hi Billy, thank you for your positive feedback and continued support of the Kobalt brand!
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