... 8CU)All arms is steelWith fine adjustmentWith powerful ON/OFF Magnetic baseAccepts dial test indicators,digtial indicatiorsa and normal indicatorsDovetail ... groove for clamping a dial test indicatorStem length:380mm Magnetic force:80kg/175LbsWeight:2.0kgHydraulic Universal Magnetic stand( Magnetic stand,magnetic base, universal magnetic stand,magnetic holder,magnetic tool)