1Permanent magnet operation with on/off control. 2The V-slot base can be securely mounted on a cylindrical surface. 3Ideal for holding the lever indicator in any direction on the machine for alignment. 4Flexible, robust and accurate swivel joints for any direction and position. 5Powerful magnetic base with on/off switch for magnets. 6High stability, it will be your ideal tool for measuring in the field of precision workpieces. 7Scope of application: This flexible magnetic base is used with a dial indicator (not included) and is widely used for mechanical processing, workpiece measurement and equipment calibration. It makes it easy to measure the outer circle, small holes and grooves to the ordinary dial indicator. It is a versatile and useful measurement tool that improves accuracy and productivity. It is an indispensable tool for inspection, measurement, etc. of machine tools, cast iron plates, etc. Item Type:Magnetic Base Flexible Holder Magnetic Suction Force:588N(60Kg)Base Size:55 x 56 x 56mm / 2.17 x 2.2 x 2.2inArm Length:364mm / 14.33in. 1 x Magnetic Base Flexible Holder Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.