Helko Werk Dual Grit Axe Sharpening Stone - Axe Sharpener, Machete Sharpener and Hatchet Sharpener (120 coarse grit, 320 fine grit) (Sharpening Stone #22100) - Bimiup Store
Smith's Pack Pal Survival Sharpener - MacheteSpecialists.com
Smith's 50582 Axe and Machete Sharpener for sale online | eBay