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Dan’s Whetstones – https://www.danswhetstone.com/
Griffith Shaving Goods – https://www.griffithshavinggoods.com/
Penn Tool Co. – Abrasive Products | Abrasives | Penn Tool Co.
Natural Whetstone – http://www.naturalwhetstone.com/
Best Sharpening Stones – https://www.bestsharpeningstones.com/
TomoNagura (Keith Johnson) – https://www.etsy.com/shop/TomoNagura
