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, etcDesigned 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. 60 x 50 x 55mmTotal Height : Approx. 350mmClamping Hole Diameter : Approx. 8mmMaterial : Metal Package included :1 x Universal Magnetic Base StandDetails pictures :