Naniwa A-102 Flattening Stone for Japanese Whetstones and core section

and core section

Its durable ABS plastic base contains keyed holes that accurately set the stones’ sharpening angles at 30° (15° each side) or 40° (20° each side) for sharpening knives

great for wood carving thanks to the stone-washed Sleipner stainless steel blade and fire-crafting capability using the back flat tang

you have the choice of how you want to sharpen a knife

Smith & Wesson covers all the bases with this handy all-in-one multi-tool

Naniwa A-102 Flattening Stone for Japanese Whetstones and core sectionInstructions: Soak the flattening stone in water for about 5 minutes before using it to flatten the surface of a Japanese whetstone. 220 Grit 170 x 55 x 30 mm Made in Japan