Features : Permanent magnet operation with ON/OFF control. V-grooved base for secure mounting on cylindrical surfaces. Ideal for holding lever indicators at any orientation on a machine tool for alignment operations. Flexible, strong, and precise rotary joints, can adjust any direction and location. Powerful magnetic base, with on/off switch for magnet. With high stability, it will be your ideal tool in the measurement of precision workpiece field. One magnetic base. It can used for Dial indicator and Lever dial indicator, etc Designed with three joints. Easy using for metalwork pieces. There is On/Off switch on the base. Specifications : Base Size(L x W x H) : Approx. 61 x 49 x 54mm Total Height : Approx. 350mm Clamping Hole Diameter : Approx. 8mm Package included : 1 x Universal Magnetic Base Stand