Vacuum-Mounted Indicator Holder Arm Type Articulating Base Height 1 in Base Size 3 35/64 in W x 1 in H Base Type Vacuum Base Width 3 35/64 in Compatible Indicator Mounts 3/8 in Fine Adjustment Position Fine Adjust Top (FAT) Holding Power 176 lbf Maximum Reach 10.039 in Step Type Flat Working Length of Post/Lower Arm 3.74 in Working Length of Snug/Third Arm 2.953 in Working Length of Upper Arm 2.795 in Base Thread Size M8 x 1.25 Construction Steel Includes Snug Yes