CROCKER STYLE GRAVER SHARPENER ENGRAVER TOOL HOLDER FOR OILSTONE EDGE SHARPENING (E 11) CROCKER STYLE GRAVER SHARPENER ENGRAVER TOOL HOLDER FOR OILSTONE EDGE SHARPENING CROCKER STYLE GRAVER SHARPENER Crocker style graver sharpener is a tool to hold graver in a fixed position while sharpening on a bench oilstone. Graver can be adjusted and set to any angle by setting index and locked in for accuracy. Tool can be used to sharpen: Gravers, Screwdrivers and other fine edge tools on a Oil-stone.