Carbide Probes, Inc. manufactures Tungsten Carbide and Ruby replacement Test Indicator Tips, AGD and Metric style contacts, Carbon Fiber Styli, Contracer Styli, Electronic Gage tips, CMM Styli and offers a wide range of Ruby and Carbide Ball diameters for any probe or special application. All of our contact tips and styli are manufactured at our facility in Dayton, Ohio.