... long or as your drawing 3)Finish:nickel Brass knurled screw Feature Material: Copper, high speed steel, carbon steel, alloy ... cylindrical grinder,inner-aperture grinder,Sodick EDM, CNC grinding machine,CNC milling machine,polishing machine, engine lathe,Projector (imported from Japan),wire EDM machineAdvantageAccuracy ... , please provide complete specifications and prints where possible. knurl screw