used on surface grinders,,,selling off my purchases of specifically made grinding fixtures that made / held round shank form tools at flanders tool in nj they made quanties of formed cutting rotary tools for schrader linde union carbine and others very accurate purpose ground tools for ports of hydraulic valves etc,,, company ceased opperations after owner died 15 yrs ago,,, time to sell you are buying all tools shown qty 5 all different