Magnetic Indicator Holder, Arm Type Articulating, Base Height 1 5/16 in, Base Length 1 29/32 in, Base Size 1.9 in L x 1.9 in W x 1.32 in H, Base Type Magnetic, Base Width 1 29/32 in, Compatible Indicator Mounts 0.23 Stem Hole, 5/32 Dovetail Mount, Holding Power 80 lbf, Maximum Reach 8 in, Step Type Slotted, Working Length of Post/Lower Arm 4 in, Working Length of Upper Arm 3 in, Base Thread Size M6 x 1.0, Construction Steel, Includes Snug No, Magnet Type Always On, Screw Type Plastic Knob