Magnetic-Base Indicator Holder Arm Type Rigid Base Height 2 13/64 in Base Length 2 23/64 in Base Size 2.362 in L x 1.969 in W x 2 1/5 in H Base Type Magnetic Base Width 1 31/32 in Compatible Indicator Mounts 3/8 in Fine Adjustment Position Fine Adjust Top (FAT) Holding Power 220 lbf Maximum Reach 22.637 in Step Type V Step Working Length of Post/Lower Arm 13.976 in Working Length of Upper Arm 8.661 in Base Thread Size M8 x 1.25 Construction Steel Includes Snug Yes