New carbide burrs for sharpening a chainsaw chain! Spiral single cut fluted shape – available in 9/64″[3.6mm], 5/32″[4.0mm], 3/16″[4.8mm], 7/32″[5.5mm]. How do they work? Not sure – first trials seem to show they take less than a diamond stone or certainly less than the coarse version. They fit nicely in your standard Dremel type tool [Note there is no thread on these to fit the Granberg grinders].
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basket ![A5.5 5.5mm[7/32"] Carbide Sharpening Burr - Sharpens .404 and 3/8 Chains](https://www.chainsawbars.co.uk/content/uploads/5.5mm732-Carbide-Sharpening-Burr-Sharpens-.404-and-38-Chains-scaled.jpg)
![A5.5 5.5mm[7/32"] Carbide Sharpening Burr - Sharpens .404 and 3/8 Chains - Image 2](https://www.chainsawbars.co.uk/content/uploads/Chainsaw-Sharpenng-Carbide-Burr-6.jpg)
![A5.5 5.5mm[7/32"] Carbide Sharpening Burr - Sharpens .404 and 3/8 Chains - Image 3](https://www.chainsawbars.co.uk/content/uploads/Chainsaw-Sharpenng-Carbide-Burr-1.jpg)
![A5.5 5.5mm[7/32"] Carbide Sharpening Burr - Sharpens .404 and 3/8 Chains - Image 4](https://www.chainsawbars.co.uk/content/uploads/Chainsaw-Sharpenng-Carbide-Burr-7.jpg)
![A5.5 5.5mm[7/32"] Carbide Sharpening Burr - Sharpens .404 and 3/8 Chains - Image 5](https://www.chainsawbars.co.uk/content/uploads/Chainsaw-Sharpenng-Carbide-Burr-5.jpg)
![A5.5 5.5mm[7/32"] Carbide Sharpening Burr - Sharpens .404 and 3/8 Chains - Image 6](https://www.chainsawbars.co.uk/content/uploads/Chainsaw-Sharpenng-Carbide-Burr-4.jpg)
![A5.5 5.5mm[7/32"] Carbide Sharpening Burr - Sharpens .404 and 3/8 Chains - Image 7](https://www.chainsawbars.co.uk/content/uploads/Chainsaw-Sharpenng-Carbide-Burr-3.jpg)
![A5.5 5.5mm[7/32"] Carbide Sharpening Burr - Sharpens .404 and 3/8 Chains - Image 8](https://www.chainsawbars.co.uk/content/uploads/Chainsaw-Sharpenng-Carbide-Burr-2.jpg)

![5.2mm[13/64"] Diamond Coarse - Sharpens 3/8 Chains [Old Style]](https://www.chainsawbars.co.uk/content/uploads/5.2mm1364-Diamond-Coarse-Sharpens-38-Chains-New-Style-350x263.jpg)
![4.8mm[3/16"] Diamond Fine - Sharpens .325 Chains [Old Style]](https://www.chainsawbars.co.uk/content/uploads/4.8mm316-Diamond-Fine-Sharpens-.325-Chains.jpg)