grindstones. two whetstones and steel knife blade. oval and rectangular double layer sharpening stone on wooden table background

abrasive acuminate background bevel blade brick brown carborundum closeup cut domestic double edge emery equipment finegrained gray grind grinder grindstone grindstones handle hone instrument kitchenware knife layer new object oval polish rectangular rough sharpen sharpener sharpening steel stone straight surface table tool two utensils whet whetstone whetstones wood wooden