♪Invincible configuration: Ruby (synthetic sapphire) ball tip for light weight, wear resistance, stability with changes in temperature, suitable for delicate and silicon carbide surfaces, and non-magnetic and non-conductive properties for use in electrical discharge machining (EDM) processes. ♪Meticulously made: The probe has no interference during use, stable performance, and good wear resistance, which can improve your work efficiency and save time; This contact point has thread size, and is used for measuring instruments, precision calculating instruments. ♪Package list: 1 * Indicator needle; #1, M1.6*L14.7*D2.0 Ruby head; #3, M1.6*L20.9*D2.0 Ruby head; #6, M1.6*L36.8*D2.0 Ruby head; #7, M1.6*L44.5*D2.0 tungsten steel head. ♪Ingenuity design: Fine workmanship, stable performance when you use it; Fully satisfy the requirement of dial gauge for measuring accuracy. ♪Excellent practicability: The whole body of product is made of tungsten steel, high hardness, long service life; Easy to install, just connect with dial gauge; The product is suitable for dovetail rails dial gauge (please pay attention to the size you need when buying)., Manufacturer: Hilitand