Features Switch on/off magnetic base to move at any time without reaction force, avoiding damage to the gauge and working desk. Made of high quality alloy, the shell is rust-proof, durable and beautiful. Concise structure, easy to use and maintain, high sensitivity, stable and reliable. Flexible universal arm can be fixed at any angle, easy and quick to use. Widely used in mechanical correction and technical measurement. Description:Magnetic base holder also known as universal base holder is widely used in the machine manufacturing industry, which is also used in various scientific research institutions. There is a cylinder with a bar-shaped permanent magnet inside it. And the position of the outer base is a soft magnetic material, which is a kind of ferrite material that is easy to magnetize or demagnetize in the weak magnetic field. Specifications:Material: alloyColor: redThread: M5Size (L*W): 11*6.3cm/4.33*2.48inWeight: Approx. 158g Package Includes:1 x Universal Magnetic Base Holder Note:1.  Due to the difference between the monitors and light effect, the picture may not reflect  the actual color of the item.2.  Please allow 1-3mm error due to the manual measurement. Thanks for your understanding. Package List