Its low-cost, disposable design offers limitless applications.
Use it to initial personal tools or to restore graduations on rules, height gages, calipers, micrometers, etc.Fowler 52-730-005-0 Disposable Chemical Etching Pen for Metal SpecificationsOverall Length: 6-1/4" Disposable Chemical Etching Pen for Metal A "must" for any tool room and machine shop for general marking purposes, Fowler's metal etching pen is used on copper, copper alloy, stainless steel, hardened steel tools and castings, etc..