Crocker Graver SharpenerA Crocker style Graver Sharpener is a traditional tool used for decades by some of the greatest craftsmen. Set your angle precisely with consistency while grinding and sharpening your hand engraver tools Choose from two angles to quickly achieve the accurate hone and sharp edge you need for professional engraving results. Index adjustment for both angle and pitch. Use with sharpening stones of your choice. Maximum graver handle shaft diameter 13mm