Magnetic-Base Indicator Holder Arm Type Articulating Base Height 55 mm Base Length 120 mm Base Size 120 mm L x 50 mm W x 55 mm H Base Type Magnetic Base Width 50 mm Compatible Indicator Mounts 6 mm Fine Adjustment Position Fine Adjust Top (FAT) Holding Power 1 300 N Maximum Reach 580 mm Step Type V Step Working Length of Post/Lower Arm 286.5 mm Working Length of Snug/Third Arm 71 mm Working Length of Upper Arm 222.5 mm Base Thread Size M10 x 1.25 Construction Steel