Mount-on-bar chain sharpener
Every tooth the same — even if you've never filed straight
It clamps onto your bar and holds the angle for you. You just turn the handle. The chain stays on the saw — no power, no bench, no trip to town.
In stock — dispatched within 24 hours
- Free shipping
- 30-day money-back
- Ships in 24h
from 303 customer reviews
since March 2026
Stihl · Husqvarna · Echo · Oregon · Makita · Ryobi · DeWalt
The part nobody warns you about
Dust, not chips.
You already know what that means.
The saw stops pulling and you start leaning on it. It smokes. It wanders off the line. One cut takes three.
You're halfway through a cord, you're burning fuel instead of cutting wood — and the file is somewhere in the truck.
How it works
Three steps. Nothing to learn.
You don't take the chain off. You don't plug anything in. You don't measure anything.
- Clamp it on the bar
Two thumbscrews, by hand. The chain stays on the saw.
- Set the guide once
Match your chain pitch — it's stamped on the bar. Set once.
- Turn the handle
A few turns per tooth, then advance one link. Both sides come out identical.
The whole job, on a real chain
Clamped onto the bar, tooth by tooth, through to the finished edge.
Why it comes out even
Freehand filing goes wrong
in the same three places every time
The angle drifts as your arm gets tired. The left-hand cutters end up shorter than the right, so the saw pulls off the line. And the depth gauges never get touched — so the chain rides on the rakers and throws dust no matter how sharp the cutters are.
The guide fixes the first two mechanically. It locks the bit at 30° and holds the same height on every cutter — left and right, first tooth to last. Your hand doesn't hold the angle. It only turns the handle.
One thing it does not do: it does not touch the depth gauges. Run a flat file over them every third or fourth sharpening, the way you always have. It is a two-minute job, and it is what lets the cutters this tool gives you actually bite.
The result, not the tool
Same chain. Same log. One pass apart.
Left: one cutter before. Right: the same cutter after one pass.
Nothing was replaced — that's the chain you already own.
- Free shipping
- 30 days to send it back
Compatibility check
Will it fit your saw? Two taps.
Your chain pitch is stamped on the guide bar, near where it meets the saw — or printed on the chain box.
Pitch is stamped on your guide bar or the chain box.
Pick an option
Choose your chain pitch, or your saw type, and we'll tell you right away.
- Fits bars from 8" to 24"
- Any gauge, .043" to .063"
- The chain never comes off the saw
Fits chains from Stihl · Husqvarna · Echo · Oregon · Makita · Ryobi · DeWalt & more
Not sure? Send us a photo of your bar and we'll tell you before you order.
Real customers
1,500 people have sharpened their own chain with this since March
Your options
A file, a shop, a grinder, or this
All four work. They just cost you different things.
Compare with
| VikTools | Hand file | Sharpening shop | Bench grinder | |
|---|---|---|---|---|
| Holds the angle for you | Yes, mechanically | No — that's the skill | Yes | Yes |
| Chain stays on the saw | Yes | Yes | No | No |
| Needs power | No | No | — | Yes, and a bench |
| Where you can do it | Anywhere the saw is | Anywhere the saw is | In town | In the shop |
| Cost per sharpening | $0 · bit included | Pennies | $8–9 plus the drive | $0 after $100–350 |
| Skill needed | None | Years | None | Light touch, practice |
| Risk of burning the teeth | None — no heat | None | Yes, if they rush | Yes |
| Depth gauges (rakers) | Cutters only | Separate flat file | Usually yes | Separate attachment |
“Can I hand file… yes. Can I hand file better than this? No.”
If you can file a chain evenly by hand, you don't need this. Most people can't — and that's not a character flaw, it's a geometry problem.
In the field
The chain never comes off.
You never leave the job.
No outlet. No vise. No bench. It lives in the truck box next to the wedges and the bar oil.
Storm drops a tree across the lane on a Sunday. You're four cuts in and the saw starts throwing dust. You sharpen it on the tailgate and finish the tree — instead of loading up, driving into town on Monday, and paying someone $8 to do it while you wait.
“It's portable, doesn't require electricity, I can take it into the woods, and the angles are always 100% correct.”
The math
A shop charges about $8 a chain.
How many chains do you own?
That's it. No subscription, no consumable you can only buy from us, no app.
- Free shipping
- 30-day money-back
In the box
What arrives
Specifications
- Grinding bit
- Diamond-coated steel · 4.0–4.5 mmSpare 3-pack $15, kept in stock.
- Sharpening angle
- 30° — fixed by the guide
- Chain pitches
- 1/4" · 3/8" LP · .325" · 3/8" full.404" needs a larger bit — not included
- Bar length
- 8" to 24"
- Chain gauge
- .043" to .063"
- Power
- None — manual crank
- Weight
- 390 g · 13.8 oz
No risk
Sharpen one chain.
If it doesn't cut, send it back.
From the day it arrives. Email us and we refund it — no explanation needed, no argument.
Worldwide. Dispatched within 24 hours.
Send a photo of your bar before you order and we'll tell you if it fits. Same inbox after you order.
Straight answers
Questions people actually ask
Will it fit my saw?
If your chain is 1/4", 3/8" LP, .325" or 3/8" full — yes. That covers nearly every homeowner and farm saw sold in the US, Canada and Australia, on bars from 8" to 24". Heavy .404" pro chains need a larger bit we do not have yet. The pitch is stamped on your guide bar. Not sure? Send us a photo before you order.
How long does a full chain take?
A few minutes for an 18-inch chain the first time, reading the card as you go. After that it is about the time it takes to refuel.
I've filed by hand for 25 years. Why would I need this?
You might not. If your cutters come out even and your saw doesn't pull, keep filing. This is for the days your arm is tired, the light is going, or the chain took a rock — and for anyone who never got taught properly in the first place.
Will it overheat or ruin my chain?
It can't. There is no motor and no speed — a hand crank doesn't generate the heat that blues a cutter on a bench grinder. It also can't take off more than the guide allows, which is what happens when a shop is in a hurry.
How many chains does one bit last, and can I buy more?
Three bits come in the box, and a three-pack of spares is $15 — we keep them in stock, so you'll never be stuck with a tool you can't feed.
Does it touch the depth gauges (rakers)?
No — it sharpens the cutters. The depth gauges sit just in front of each tooth and set how deep that tooth can bite. Take them down with a flat file every third or fourth sharpening, the way you always have. Worth knowing: if you sharpen and still get dust, that is almost always the rakers riding high, not the chain.
What's it actually made of?
The grinding bit is Diamond-coated steel, 4.0–4.5 mm — that's the part that does the cutting and the part that wears. The whole tool weighs 390 g (13.8 oz) and takes no power at all.
What if I can't figure it out?
The card in the box is three steps on one side, and there's a video on this page that shows the whole job on a real chain. If you're still stuck, email us — a person answers. And if it's not for you, 30 days.
One chain. Then decide.
Clamp it on, sharpen one chain, and go cut something. If it doesn't throw chips, send it back inside 30 days and we refund it.
$59.99$119.99·Free shipping·Ships within 24 hours 3 bits in the box·Fits 1/4" to 3/8" full·30-day money-back