I keep all my whittling tools sharp using these they work very well for me
https://www.amazon.com/Flexcut-Slip...473525&sr=8-3&keywords=carving+tool+sharpener
https://www.amazon.com/SUEHIRO-Whet...473525&sr=8-4&keywords=carving+tool+sharpener
https://www.amazon.com/Whetstone-St...73525&sr=8-13&keywords=carving+tool+sharpener
https://www.amazon.com/Flexcut-Slip...473525&sr=8-3&keywords=carving+tool+sharpener
https://www.amazon.com/SUEHIRO-Whet...473525&sr=8-4&keywords=carving+tool+sharpener
https://www.amazon.com/Whetstone-St...73525&sr=8-13&keywords=carving+tool+sharpener