Curved-Diamond-Whetstone-250mm-Faithfull-LX1289-p-The-Faithfull-Curved-Diamond-Whetstone-is-a-uniquely-shaped-stone-specially-designed-for-the-sharpening-of-wood-turning-tools-&-carving-chisels-Its-curved-diamond-surface-lets-you-sharpen-both-concave-&-convex-surfaces-The-small-end-has-a-radius-of-approx-3mm-1-8in-&-tapers-up-to-the-large-end-with-a-radius-of-28mm-1-1-8in-p-p-The-double-sided-steel-stone-is-coated-with-mono-crystalline-diamond-in-600G-medium-&-1200G-fine-g