The needle is connected to the machine with a convenient thread. The needle is made of tungsten steel, which is durable and has a long service life. With sensitive measuring speed, you can quickly measure the object. The contact point is universal, it can be connected to several indicators. The needle is inserted in a box for better protection and easy access. Characteristics: The needle is made of tungsten steel, durable and has a long service life. With sensitive measurement speed, you can quickly measure the object. The needle is connected to the machine with thread, convenient. The needle is inserted in a box for better protection and easy access. The contact point is universal, can be connected to multiple indicators. Features: Material: tungsten steel. Discussion : M2.5. Dimensions (tip diameter x length): 1.5 x 50 mm. Package contents: 1 dial indicator needle.