The magnetic base is made of high quality carbon steel, durable to use The magnetic base is equipped with a permanent alloy magnet and a central locking mechanism with anti-loose springs Switch on/off magnetic base to move at any time without reaction force, avoiding damage to the gauge and working desk The magnetic base has concise structure, easy to use and maintain, high sensitivity, stable and reliable Smooth universal arm can be fixed at any angle, easy and quick to use, widely used in mechanical correction and technical measurement