Arm Only Arm Type Articulating Base Height 12.5 mm Base Size 12.5 mm H Base Type Non-Magnetic Compatible Indicator Mounts 6 mm Fine Adjustment Position Fine Adjust Top (FAT) Holding Power 0 lbf Maximum Reach 317 mm Working Length of Post/Lower Arm 133 mm Working Length of Snug/Third Arm 71 mm Working Length of Upper Arm 113 mm Base Thread Size M8 x 1 Construction Steel Includes M6/M8 Adaptor Includes Snug Yes Screw Type Plastic Knob